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119-991: Historically, the Bedel Pass served as a Silk Road trade route between China and Central Asia . On the Chinese side, the Bedel Beacon Tower ( 別迭里烽燧 ) is located on the foothills along the path. It was built during the Han dynasty as part of the Han Great Wall . The beacon was reused and renovated during the Tang dynasty . During the Sui and Tang dynasties, the pass was the main trade route linking Tarim Basin and Western Turks in Central Asia. A number of scholars argue that Chinese explorer Xuanzang who inspired

238-429: A KMT era sentry post which is a local cultural heritage site. Historical maps of the region including Bedel Pass: This Kyrgyzstan location article is a stub . You can help Misplaced Pages by expanding it . This Xinjiang location article is a stub . You can help Misplaced Pages by expanding it . Silk Road The Silk Road was a network of Eurasian trade routes active from the second century BCE until

357-539: A "complex network of trade routes" that gave people the chance to exchange goods and culture. A maritime Silk Route opened up between Chinese-controlled Giao Chỉ (centred in modern Vietnam , near Hanoi ), probably by the 1st century. It extended, via ports on the coasts of India and Sri Lanka , all the way to Roman -controlled ports in Roman Egypt and the Nabataean territories on the northeastern coast of

476-596: A "silk" one in particular. William Dalrymple points out that in pre-modern times, maritime travel cost only a fifth of overland transport, and argues for the pre-13th century primacy of an India-dominated " Golden Road " extending from Rome to Japan. The southern stretches of the Silk Road, from Khotan ( Xinjiang ) to Eastern China, were first used for jade and not silk, as long as 5000 BCE , and are still in use for this purpose. The term "Jade Road" would have been more appropriate than "Silk Road" had it not been for

595-707: A Chinese tomb of Shanxi province dated to the Sui dynasty (581–618). Both the Old Book of Tang and New Book of Tang , covering the history of the Chinese Tang dynasty (618–907), record that a new state called Fu-lin (拂菻; i.e. Byzantine Empire) was virtually identical to the previous Daqin (大秦; i.e. Roman Empire). Several Fu-lin embassies were recorded for the Tang period, starting in 643 with an alleged embassy by Constans II (transliterated as Bo duo li , 波多力, from his nickname "Kōnstantinos Pogonatos") to

714-631: A contingent of Roman legionaries. The Romans may have been part of Antony 's army invading Parthia . Sogdiana (modern Bukhara ), east of the Oxus River, on the Polytimetus River, was apparently the most easterly penetration ever made by Roman forces in Asia. The margin of Chinese victory appears to have been their crossbows, whose bolts and darts seem easily to have penetrated Roman shields and armour. The Han dynasty army regularly policed

833-737: A leading astronomer and physician in Khanbaliq , at the court of Kublai Khan , Mongol founder of the Yuan dynasty (1271–1368) and was even granted the noble title 'Prince of Fu lin' ( Chinese : 拂菻王; Fú lǐn wáng). The Uyghur Nestorian Christian diplomat Rabban Bar Sauma , who set out from his Chinese home in Khanbaliq (Beijing) and acted as a representative for Arghun (a grandnephew of Kublai Khan), traveled throughout Europe and attempted to secure military alliances with Edward I of England , Philip IV of France , Pope Nicholas IV , as well as

952-405: A means of currency, just as valuable as silk yarn and textiles. Under its strong integrating dynamics on the one hand and the impacts of change it transmitted on the other, tribal societies previously living in isolation along the Silk Road, and pastoralists who were of barbarian cultural development, were drawn to the riches and opportunities of the civilisations connected by the routes, taking on

1071-486: A number of important technologies, and in addition to raiding vulnerable settlements for these commodities, they also encouraged long-distance merchants as a source of income through the enforced payment of tariffs. Sogdians played a major role in facilitating trade between China and Central Asia along the Silk Roads as late as the 10th century, their language serving as a lingua franca for Asian trade as far back as

1190-664: A number of industrial and construction processes. The oldest known archaeological fragments of the immediate precursor to modern paper date to the 2nd century BCE in China . The pulp papermaking process is ascribed to Cai Lun , a 2nd-century CE Han court eunuch . It has been said that knowledge of papermaking was passed to the Islamic world after the Battle of Talas in 751 CE when two Chinese papermakers were captured as prisoners and used to extract 'the secrets' of papermaking. Although

1309-527: A rag paper. The aging behaviour of a paper is determined by its manufacture, not the original source of the fibres. Furthermore, tests sponsored by the Library of Congress prove that all paper is at risk of acid decay, because cellulose itself produces formic, acetic, lactic and oxalic acids. Mechanical pulping yields almost a tonne of pulp per tonne of dry wood used, which is why mechanical pulps are sometimes referred to as "high yield" pulps. With almost twice

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1428-447: A variety of aluminium sulfate salt that is significantly acidic . Alum was added to paper to assist in sizing , making it somewhat water resistant so that inks did not "run" or spread uncontrollably. Early papermakers did not realize that the alum they added liberally to cure almost every problem encountered in making their product would be eventually detrimental. The cellulose fibres that make up paper are hydrolyzed by acid, and

1547-462: A wide variety of properties, depending on its intended use. It is estimated that paper-based storage solutions captured 0.33% of the total in 1986 and only 0.007% in 2007, even though in absolute terms the world's capacity to store information on paper increased from 8.7 to 19.4 petabytes . It is estimated that in 1986 paper-based postal letters represented less than 0.05% of the world's telecommunication capacity, with sharply decreasing tendency after

1666-443: Is uncoated . Coated paper has a thin layer of material such as calcium carbonate or china clay applied to one or both sides in order to create a surface more suitable for high-resolution halftone screens. (Uncoated papers are rarely suitable for screens above 150 lpi.) Coated or uncoated papers may have their surfaces polished by calendering . Coated papers are divided into matte, semi-matte or silk, and gloss. Gloss papers give

1785-491: Is a lamination of natural plant fibre, while paper is manufactured from fibres whose properties have been changed by maceration. To make pulp from wood, a chemical pulping process separates lignin from cellulose fibre. A cooking liquor is used to dissolve the lignin , which is then washed from the cellulose ; this preserves the length of the cellulose fibres. Paper made from chemical pulps are also known as wood-free papers (not to be confused with tree-free paper ); this

1904-571: Is a modern name, acquired from its similarity to the overland Silk Road. Like the overland routes, the ancient maritime routes through Southeast Asia and the Indian Ocean had no particular name for the majority of its very long history. Despite the modern name, the Maritime Silk Road involved exchanges in a wide variety of goods over a very wide region, not just silk or Asian exports. It differed significantly in several aspects from

2023-455: Is a thick, paper-like material produced from the pith of the Cyperus papyrus plant, which was used in ancient Egypt and other Mediterranean cultures for writing before the introduction of paper. Although the word paper is etymologically derived from papyrus , the two are produced very differently and the development of the first is distinct from the development of the second. Papyrus

2142-574: Is another specialty process used to pulp straws , bagasse and hardwoods with high silicate content. There are two major mechanical pulps: thermomechanical pulp (TMP) and groundwood pulp (GW). In the TMP process, wood is chipped and then fed into steam-heated refiners, where the chips are squeezed and converted to fibres between two steel discs. In the groundwood process, debarked logs are fed into grinders where they are pressed against rotating stones to be made into fibres. Mechanical pulping does not remove

2261-451: Is because they do not contain lignin, which deteriorates over time. The pulp can also be bleached to produce white paper, but this consumes 5% of the fibres. Chemical pulping processes are not used to make paper made from cotton, which is already 90% cellulose. There are three main chemical pulping processes: the sulfite process dates back to the 1840s and was the dominant method before the second world war. The kraft process , invented in

2380-475: Is considered card. The weight of a ream therefore depends on the dimensions of the paper and its thickness. Most commercial paper sold in North America is cut to standard paper sizes based on customary units and is defined by the length and width of a sheet of paper. The ISO 216 system used in most other countries is based on the surface area of a sheet of paper, not on a sheet's width and length. It

2499-496: Is cut to width with holes punched at the edges, and folded into stacks. All paper produced by paper machines such as the Fourdrinier Machine are wove paper, i.e. the wire mesh that transports the web leaves a pattern that has the same density along the paper grain and across the grain. Textured finishes, watermarks and wire patterns imitating hand-made laid paper can be created by the use of appropriate rollers in

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2618-417: Is formed as a paper web and the water is removed from it by pressing and drying. Pressing the sheet removes the water by force. Once the water is forced from the sheet, a special kind of felt, which is not to be confused with the traditional one, is used to collect the water. When making paper by hand, a blotter sheet is used instead. Drying involves using air or heat to remove water from the paper sheets. In

2737-732: The Alans ], Lijian [Syria under the Greek Seleucids], Tiaozhi (Mesopotamia), and Tianzhu [northwestern India] ... As a rule, rather more than ten such missions went forward in the course of a year, and at the least five or six. ( Hou Hanshu , Later Han History). These connections marked the beginning of the Silk Road trade network that extended to the Roman Empire. The Chinese campaigned in Central Asia on several occasions, and direct encounters between Han troops and Roman legionaries (probably captured or recruited as mercenaries by

2856-656: The Berel burial ground in Kazakhstan , confirmed that the nomadic Arimaspians were not only breeding horses for trade but also produced great craftsmen able to propagate exquisite art pieces along the Silk Road. From the 2nd millennium BCE, nephrite jade was being traded from mines in the region of Yarkand and Khotan to China. Significantly, these mines were not very far from the lapis lazuli and spinel ("Balas Ruby") mines in Badakhshan , and, although separated by

2975-703: The Han court eunuch Cai Lun , although the earliest archaeological fragments of paper derive from the 2nd century BCE in China. Although paper was originally made in single sheets by hand, today it is mass-produced on large machines—some making reels 10 metres wide, running at 2,000 metres per minute and up to 600,000 tonnes a year. It is a versatile material with many uses, including printing , painting, graphics, signage, design, packaging, decorating, writing , and cleaning . It may also be used as filter paper, wallpaper, book endpaper, conservation paper, laminated worktops, toilet tissue, currency, and security paper, or in

3094-849: The Hungarian plain and the Carpathian Mountains to the Chinese Gansu Corridor, and linking the Middle East with Northern India and the Punjab , undoubtedly played an important role in the development of the Silk Road. Scythians accompanied the Assyrian Esarhaddon on his invasion of Egypt, and their distinctive triangular arrowheads have been found as far south as Aswan . These nomadic peoples were dependent upon neighbouring settled populations for

3213-779: The Karakum Desert . Both routes joined the main southern route before reaching ancient Merv , Turkmenistan. Another branch of the northern route turned northwest past the Aral Sea and north of the Caspian Sea , then and on to the Black Sea. A route for caravans, the northern Silk Road brought to China many goods such as "dates, saffron powder and pistachio nuts from Persia; frankincense , aloes and myrrh from Somalia ; sandalwood from India; glass bottles from Egypt, and other expensive and desirable goods from other parts of

3332-564: The Kushan Empire between the first and third centuries reinforced the role of the powerful merchants from Bactria and Taxila . They fostered multi-cultural interaction as indicated by their 2nd century treasure hoards filled with products from the Greco-Roman world, China, and India, such as in the archeological site of Begram . The Silk Road trade did not sell only textiles, jewels, metal and cosmetic, but also slaves, connecting

3451-939: The Magyars , Armenians , and Chinese. The Silk Road reached its peak in the west during the time of the Byzantine Empire ; in the Nile- Oxus section, from the Sassanid Empire period to the Il Khanate period; and in the sinitic zone from the Three Kingdoms period to the Yuan dynasty period. Trade between East and West also developed across the Indian Ocean , between Alexandria in Egypt and Guangzhou in China. Persian Sassanid coins emerged as

3570-758: The Malay Peninsula , and the Mekong Delta ; through which passed the main routes of the Austronesian trade ships to Giao Chỉ (in the Tonkin Gulf ) and Guangzhou (southern China ), the endpoints (later also including Quanzhou by the 10th century CE). Secondary routes also passed through the coastlines of the Gulf of Thailand ; as well as through the Java Sea , Celebes Sea , Banda Sea , and

3689-862: The Maldives . It branches from here into routes through the Arabian Sea entering the Gulf of Oman (into the Persian Gulf ), and the Gulf of Aden (into the Red Sea ). Secondary routes also pass through the coastlines of the Bay of Bengal , the Arabian Sea, and southwards along the coast of East Africa to Zanzibar , the Comoros , Madagascar , and the Seychelles . The term "Maritime Silk Road"

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3808-520: The Persian Gulf and Red Sea into Persia , Mesopotamia (sailing up the Euphrates River in modern-day Iraq ), Arabia , Egypt , Aksum (Ethiopia), and Somalia in the Horn of Africa . The Silk Road represents an early phenomenon of political and cultural integration due to inter-regional trade. In its heyday, it sustained an international culture that strung together groups as diverse as

3927-884: The Red Sea . The earliest Roman glassware bowl found in China was unearthed from a Western Han tomb in Guangzhou , dated to the early 1st century BCE, indicating that Roman commercial items were being imported through the South China Sea . According to Chinese dynastic histories , it is from this region that the Roman embassies arrived in China, beginning in 166 CE during the reigns of Marcus Aurelius and Emperor Huan of Han . Other Roman glasswares have been found in Eastern-Han-era tombs (25–220 CE) further inland in Luoyang , Nanyang , and Nanjing . Soon after

4046-745: The Sasanian Empire that allowed the Byzantines to bypass the Sasanian merchants and trade directly with the Sogdians for purchasing Chinese silk. Although the Byzantines had already procured silkworm eggs from China by this point, the quality of Chinese silk was still far greater than anything produced in the West, a fact that is perhaps emphasized by the discovery of coins minted by Justin II found in

4165-575: The Silla Kingdom in Gyeongju , Korea. Chinese wealth grew as they delivered silk and other luxury goods to the Roman Empire, whose wealthy women admired their beauty. The Roman Senate issued, in vain, several edicts to prohibit the wearing of silk, on economic and moral grounds: the import of Chinese silk caused a huge outflow of gold, and silk clothes were considered decadent and immoral. I can see clothes of silk, if materials that do not hide

4284-587: The Stockholm Convention on Persistent Organic Pollutants . Dioxins are highly toxic, and health effects on humans include reproductive, developmental, immune and hormonal problems. They are known to be carcinogenic. Over 90% of human exposure is through food, primarily meat, dairy, fish and shellfish, as dioxins accumulate in the food chain in the fatty tissue of animals. The paper pulp and print industries emitted together about 1% of world greenhouse-gas emissions in 2010 and about 0.9% in 2012. In

4403-668: The Sulu Sea , reconnecting with the main route through the northern Philippines and Taiwan . The secondary routes also continue onward to the East China Sea and the Yellow Sea for a limited extent. The main route of the western regions of the Maritime Silk Road directly crosses the Indian Ocean from the northern tip of Sumatra (or through the Sunda Strait ) to Sri Lanka , southern India and Bangladesh , and

4522-715: The Wusun . Zhang Qian's report suggested the economic reason for Chinese expansion and wall-building westward, and trail-blazed the Silk Road, making it one of the most famous trade routes in history and in the world. After winning the War of the Heavenly Horses and the Han–Xiongnu War , Chinese armies established themselves in Central Asia, initiating the Silk Route as a major avenue of international trade. Some say that

4641-491: The hydrogen bonds in the paper can be broken and fibres separated again. Most recycled paper contains a proportion of virgin fibre for the sake of quality; generally speaking, de-inked pulp is of the same quality or lower than the collected paper it was made from. There are three main classifications of recycled fibre: Recycled papers can be made from 100% recycled materials or blended with virgin pulp, although they are (generally) not as strong nor as bright as papers made from

4760-479: The lignin , so the yield is very high, > 95%; however, lignin causes the paper thus produced to turn yellow and become brittle over time. Mechanical pulps have rather short fibres, thus producing weak paper. Although large amounts of electrical energy are required to produce mechanical pulp, it costs less than the chemical kind. Paper recycling processes can use either chemically or mechanically produced pulp; by mixing it with water and applying mechanical action

4879-428: The 12th century, the route was used to ship bullion from Yunnan (gold and silver are among the minerals in which Yunnan is rich), through northern Burma, into modern Bangladesh , making use of the ancient route, known as the 'Ledo' route. The emerging evidence of the ancient cities of Bangladesh, in particular Wari-Bateshwar ruins, Mahasthangarh , Bhitagarh , Bikrampur , Egarasindhur, and Sonargaon , are believed to be

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4998-448: The 1870s and first used in the 1890s, is now the most commonly practised strategy; one of its advantages is the chemical reaction with lignin produces heat, which can be used to run a generator. Most pulping operations using the kraft process are net contributors to the electricity grid or use the electricity to run an adjacent paper mill. Another advantage is that this process recovers and reuses all inorganic chemical reagents. Soda pulping

5117-681: The 2022−2024 edition of the annual "Pulp and paper capacites survey", the Food and Agriculture Organization of the United Nations (FAO) reports that Asia has superseded North America as the top pulp and paper producing continent. FAO figures for 2021 show the production of graphic papers continuing its decline from a mid-2000s peak to hover below 100 million tonnes a year. By contrast, the production of other papers and paperboard – which includes cardboard and sanitary products – has continued to soar, exceeding 320 million tonnes. FAO has documented

5236-703: The 4th century. The Silk Road was initiated and spread by China's Han dynasty through exploration and conquests in Central Asia . With the Mediterranean linked to the Fergana Valley , the next step was to open a route across the Tarim Basin and the Hexi Corridor to China Proper . This extension came around 130 BCE, with the embassies of the Han dynasty to Central Asia following the reports of

5355-417: The 640s and 650s. During Emperor Taizong's reign alone, large campaigns were launched against not only the Göktürks , but also separate campaigns against the Tuyuhun , the oasis states , and the Xueyantuo . Under Emperor Taizong , Tang general Li Jing conquered the Eastern Turkic Khaganate . Under Emperor Gaozong , Tang general Su Dingfang conquered the Western Turkic Khaganate , an important ally of

5474-439: The Byzantine empire. After these conquests, the Tang dynasty fully controlled the Xiyu , which was the strategic location astride the Silk Road. This led the Tang dynasty to reopen the Silk Road, with this portion named the Tang-Tubo Road ("Tang-Tibet Road") in many historical texts. The Tang dynasty established a second Pax Sinica , and the Silk Road reached its golden age, whereby Persian and Sogdian merchants benefited from

5593-437: The Byzantine ruler Andronikos II Palaiologos . Andronikos II had two half-sisters who were married to great-grandsons of Genghis Khan , which made him an in-law with the Yuan-dynasty Mongol ruler in Beijing, Kublai Khan. The History of Ming preserves an account where the Hongwu Emperor , after founding the Ming dynasty (1368–1644), had a supposed Byzantine merchant named Nieh-ku-lun (捏古倫) deliver his proclamation about

5712-414: The Central Asian Silk Road through their ports in Barygaza (known today as Bharuch ) and Barbaricum (known today as the city of Karachi , Sindh , Pakistan ) and continued along the western coast of India. An ancient "travel guide" to this Indian Ocean trade route was the Greek Periplus of the Erythraean Sea written in 60 CE. The travelling party of Maës Titianus penetrated farthest east along

5831-478: The Chinese Emperor Wu became interested in developing commercial relationships with the sophisticated urban civilizations of Ferghana, Bactria, and the Parthian Empire : "The Son of Heaven on hearing all this reasoned thus: Ferghana (Dayuan "Great Ionians " ) and the possessions of Bactria ( Ta-Hsia ) and Parthian Empire ( Anxi ) are large countries, full of rare things, with a population living in fixed abodes and given to occupations somewhat identical with those of

5950-407: The Chinese classic Journey to the West used this pass in the 7th century on his journey to India. The name Xuanzang used for the passage was " 凌山 ", it was said to be northwest of "Kingdom of Baluka", modern day city of Aksu . However, others argue that was Muzart Pass . The pass was surveyed in 1881 by both Chinese and Russian counterparts as part of Protocol of Chuguchak of 1864 demarcating

6069-412: The Chinese people, but with weak armies, and placing great value on the rich produce of China" ( Hou Hanshu , Later Han History ). Others say that Emperor Wu was mainly interested in fighting the Xiongnu and that major trade began only after the Chinese pacified the Hexi Corridor . The Chinese were also strongly attracted by the tall and powerful horses (named " heavenly horses ") in the possession of

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6188-407: The Dayuan (literally the "Great Ionians," the Greek kingdoms of Central Asia ), which were of capital importance in fighting the nomadic Xiongnu. They defeated the Dayuan in the Han-Dayuan war . The Chinese subsequently sent numerous embassies, around ten every year, to these countries and as far as Seleucid Syria. Thus more embassies were dispatched to Anxi [Parthia], Yancai [who later joined

6307-437: The East included tea, dyes, perfumes, and porcelain ; among Western exports were horses, camels, honey, wine, and gold. Aside from generating substantial wealth for emerging mercantile classes, the proliferation of goods such as paper and gunpowder greatly affected the trajectory of political history in several theatres in Eurasia and beyond. The Silk Road was utilized over a period that saw immense political variation across

6426-510: The Empire as a whole. The Roman-style glassware discovered in the archeological sites of Gyeongju , the capital of the Silla kingdom (Korea) showed that Roman artifacts were traded as far as the Korean peninsula. The Greco- Roman trade with India started by Eudoxus of Cyzicus in 130 BCE continued to increase, and according to Strabo (II.5.12), by the time of Augustus , up to 120 ships were setting sail every year from Myos Hormos in Roman Egypt to India. The Roman Empire connected with

6545-407: The Ganges, they are only private citizens." His comments are interesting as Roman beads and other materials are being found at Wari-Bateshwar ruins , the ancient city with roots from much earlier, before the Bronze Age , presently being slowly excavated beside the Old Brahmaputra in Bangladesh. Ptolemy's map of the Ganges Delta , a remarkably accurate effort, showed that his informants knew all about

6664-436: The German term Seidenstraße (literally "Silk Road") and was first popularized in 1877 by Ferdinand von Richthofen , who made seven expeditions to China from 1868 to 1872. However, the term itself had been in use in decades prior to that. The alternative translation "Silk Route" is also used occasionally. Although the term was coined in the 19th century, it did not gain widespread acceptance in academia or popularity among

6783-400: The Han general dispatched envoy Gan Ying to Daqin (Rome). The Silk Road essentially came into being from the 1st century BCE, following these efforts by China to consolidate a road to the Western world and India , both through direct settlements in the area of the Tarim Basin and diplomatic relations with the countries of the Dayuan, Parthians and Bactrians further west. The Silk Roads were

6902-432: The Roman conquest of Egypt in 30 BCE, regular communications and trade between China, Southeast Asia, India, the Middle East, Africa, and Europe blossomed on an unprecedented scale. The Roman Empire inherited eastern trade routes that were part of the Silk Road from the earlier Hellenistic powers and the Arabs. With control of these trade routes, citizens of the Roman Empire received new luxuries and greater prosperity for

7021-587: The Roman craze for Chinese silk (supplied through the Parthians), even though the Romans thought silk was obtained from trees. This belief was affirmed by Seneca the Younger in his Phaedra and by Virgil in his Georgics . Notably, Pliny the Elder knew better. Speaking of the bombyx or silk moth, he wrote in his Natural Histories "They weave webs, like spiders, that become a luxurious clothing material for women, called silk." The Romans traded spices, glassware, perfumes, and silk. Roman artisans began to replace yarn with valuable plain silk cloths from China and

7140-421: The Silk Road from the Mediterranean world, probably with the aim of regularising contacts and reducing the role of middlemen, during one of the lulls in Rome's intermittent wars with Parthia, which repeatedly obstructed movement along the Silk Road. Intercontinental trade and communication became regular, organised, and protected by the "Great Powers." Intense trade with the Roman Empire soon followed, confirmed by

7259-419: The Silk Road slave trade to the Bukhara slave trade as well as the Black Sea slave trade , particularly slave girls. Byzantine Greek historian Procopius stated that two Nestorian Christian monks eventually uncovered the way silk was made. From this revelation, monks were sent by the Byzantine Emperor Justinian (ruled 527–565) as spies on the Silk Road from Constantinople to China and back to steal

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7378-410: The Silk Road trade. The originating source seems sufficiently reliable, but silk degrades very rapidly, so it cannot be verified whether it was cultivated silk (which almost certainly came from China) or a type of wild silk , which might have come from the Mediterranean or Middle East. Following contacts between Metropolitan China and nomadic western border territories in the 8th century BCE, gold

7497-425: The Tarim Basin, in the modern day Xinjiang region, until replaced by Turkic influences from the Xiongnu culture to the north and by Chinese influences from the eastern Han dynasty , who spoke a Sino-Tibetan language . Some remnants of what was probably Chinese silk dating from 1070 BCE have been found in Ancient Egypt . The Great Oasis cities of Central Asia played a crucial role in the effective functioning of

7616-446: The United States alone. The average office worker in the US prints 31 pages every day. Americans also use in the order of 16 billion paper cups per year. Conventional bleaching of wood pulp using elemental chlorine produces and releases into the environment large amounts of chlorinated organic compounds , including chlorinated dioxins . Dioxins are recognized as a persistent environmental pollutant, regulated internationally by

7735-550: The United States and in micrometres (μm) in the rest of the world. Paper may be between 0.07 and 0.18 millimetres (0.0028 and 0.0071 in) thick. Paper is often characterized by weight. In the United States, the weight is the weight of a ream (bundle of 500 sheets) of varying "basic sizes" before the paper is cut into the size it is sold to end customers. For example, a ream of 20 lb, 8.5 in × 11 in (216 mm × 279 mm) paper weighs 5 pounds because it has been cut from larger sheets into four pieces. In

7854-454: The United States, printing paper is generally 20 lb, 24 lb, 28 lb, or 32 lb at most. Cover stock is generally 68 lb, and 110 lb or more is considered card stock . In Europe and other regions using the ISO 216 paper-sizing system, the weight is expressed in grams per square metre (g/m or usually gsm) of the paper. Printing paper is generally between 60 gsm and 120 gsm. Anything heavier than 160 gsm

7973-474: The West for land-based trade. The Tang captured the vital route through the Gilgit Valley from Tibet in 722, lost it to the Tibetans in 737, and regained it under the command of the Goguryeo General Gao Xianzhi . While the Turks were settled in the Ordos region (former territory of the Xiongnu ), the Tang government took on the military policy of dominating the central steppe. The Tang dynasty (along with Turkic allies) conquered and subdued Central Asia during

8092-441: The Xiong Nu) are recorded, particularly in the 36 BCE battle of Sogdiana (Joseph Needham, Sidney Shapiro). It has been suggested that the Chinese crossbow was transmitted to the Roman world on such occasions, although the Greek gastraphetes provides an alternative origin. R. Ernest Dupuy and Trevor N. Dupuy suggest that in 36 BCE, [A] Han expedition into Central Asia, west of Jaxartes River , apparently encountered and defeated

8211-480: The ambassador Zhang Qian (who was originally sent to obtain an alliance with the Yuezhi against the Xiongnu ). Zhang Qian visited directly the kingdom of Dayuan in Ferghana , the territories of the Yuezhi in Transoxiana , the Bactrian country of Daxia with its remnants of Greco-Bactrian rule, and Kangju . He also made reports on neighbouring countries that he did not visit, such as Anxi ( Parthia ), Tiaozhi ( Mesopotamia ), Shendu ( Indian subcontinent ) and

8330-489: The best known include the Eurasian Land Bridge and the Chinese Belt and Road Initiative (BRI). In June 2014, UNESCO designated the Chang'an-Tianshan corridor of the Silk Road as a World Heritage Site , while the Indian portion remains on the tentative site list. The Silk Road derives its name from the lucrative trade in silk , first developed in China , and a major reason for the connection of trade routes into an extensive transcontinental network. It derives from

8449-431: The body, nor even one's decency, can be called clothes. ... Wretched flocks of maids labour so that the adulteress may be visible through her thin dress, so that her husband has no more acquaintance than any outsider or foreigner with his wife's body. The Western Roman Empire , and its demand for sophisticated Asian products, collapsed in the fifth century . The unification of Central Asia and Northern India within

8568-616: The border in the region between the Russian Empire and the Qing dynasty . During the Urkun incident of 1916, over 100,000 Kyrgyz reportedly died fleeing from Tsarist forces they attempted to reach China through the Bedel Pass. The pass is currently closed to traffic. Kumtor Gold Mine is located down the road on the Kyrgyz side. Along the path on the Chinese side is also the ruins of

8687-540: The carriers of a mixed Sogdian-Türkic culture that often came from mixed families." Paper Paper is a thin sheet material produced by mechanically or chemically processing cellulose fibres derived from wood , rags , grasses , herbivore dung , or other vegetable sources in water . Once the water is drained through a fine mesh leaving the fibre evenly distributed on the surface, it can be pressed and dried. The papermaking process developed in east Asia, probably China , at least as early as 105 CE , by

8806-437: The commerce between East and West. At the same time, the Chinese empire welcomed foreign cultures, making it very cosmopolitan in its urban centres. In addition to the land route, the Tang dynasty also developed the maritime Silk Route. Chinese envoys had been sailing through the Indian Ocean to India since perhaps the 2nd century BCE, yet, it was during the Tang dynasty that a strong Chinese maritime presence could be found in

8925-524: The continent, exemplified by major events such as the Black Death and the Mongol conquests . The network was highly decentralized, and security was sparse: travelers faced constant threats of banditry and nomadic raiders, and long expanses of inhospitable terrain. Few individuals traveled the entire length of the Silk Road, instead relying on a succession of middlemen based at various stopping points along

9044-542: The cost of manufacturing paper. In 1844, the Canadian inventor Charles Fenerty and the German inventor Friedrich Gottlob Keller independently developed processes for pulping wood fibres. Before the industrialisation of paper production the most common fibre source was recycled fibres from used textiles, called rags. The rags were from hemp , linen and cotton . A process for removing printing inks from recycled paper

9163-884: The course of the Brahmaputra River, crossing through the Himalayas then bending westward to its source in Tibet . It is doubtless that this delta was a major international trading center, almost certainly from much earlier than the Common Era. Gemstones and other merchandise from Thailand and Java were traded in the delta and through it. Chinese archaeological writer Bin Yang and some earlier writers and archaeologists, such as Janice Stargardt, strongly suggest this route of international trade as Sichuan – Yunnan – Burma – Bangladesh route. According to Bin Yang, especially from

9282-510: The court of Emperor Taizong of Tang . The History of Song describes the final embassy and its arrival in 1081, apparently sent by Michael VII Doukas (transliterated as Mie li yi ling kai sa , 滅力伊靈改撒, from his name and title Michael VII Parapinakēs Caesar) to the court of Emperor Shenzong of the Song dynasty (960–1279). However, the History of Yuan claims that a Byzantine man became

9401-560: The earliest days of papermaking, this was done by hanging the sheets like laundry; in more modern times, various forms of heated drying mechanisms are used. On the paper machine, the most common is the steam-heated can dryer. These can reach temperatures above 93 °C (200 °F) and are used in long sequences of more than forty cans where the heat produced by these can easily dry the paper to less than six percent moisture. The paper may then undergo sizing to alter its physical properties for use in various applications. Paper at this point

9520-523: The establishment of a new dynasty to the Byzantine court of John V Palaiologos in September 1371. Friedrich Hirth (1885), Emil Bretschneider (1888), and more recently Edward Luttwak (2009) presumed that this was none other than Nicolaus de Bentra, a Roman Catholic bishop of Khanbilaq chosen by Pope John XXII to replace the previous archbishop John of Montecorvino . Although the Silk Road

9639-444: The expanding production of cardboard in paper and paperboard, which has been increasing in response to the spread of e-commerce since the 2010s. Data from FAO suggest that it has been even further boosted by COVID-19-related lockdowns. Some manufacturers have started using a new, significantly more environmentally friendly alternative to expanded plastic packaging. Made out of paper, and known commercially as PaperFoam,

9758-663: The far larger and geographically wider nature of the silk trade; the term is in current use in China. The Silk Road consisted of several routes. As it extended westwards from the ancient commercial centres of China, the overland, intercontinental Silk Road divided into northern and southern routes bypassing the Taklamakan Desert and Lop Nur . Merchants along these routes were involved in "relay trade" in which goods changed "hands many times before reaching their final destinations". The northern route started at Chang'an (now called Xi'an ), an ancient capital of China that

9877-509: The formidable Pamir Mountains , routes across them were apparently in use from very early times. Genetic study of the Tarim mummies , found in the Tarim Basin , in the area of Loulan located along the Silk Road 200 kilometres (124 miles) east of Yingpan, dating to as early as 1600 BCE, suggest very ancient contacts between East and West. These mummified remains may have been of people who spoke Indo-European languages , which remained in use in

9996-498: The head of the Persian Gulf and across to Petra and on to Alexandria and other eastern Mediterranean ports from where ships carried the cargoes to Rome . The southwestern route is believed to be the Ganges / Brahmaputra Delta, which has been the subject of international interest for over two millennia. Strabo, the 1st-century Roman writer, mentions the deltaic lands: "Regarding merchants who now sail from Egypt ... as far as

10115-417: The highest optical density in the printed image. The paper is then fed onto reels if it is to be used on web printing presses, or cut into sheets for other printing processes or other purposes. The fibres in the paper basically run in the machine direction. Sheets are usually cut "long-grain", i.e. with the grain parallel to the longer dimension of the sheet. Continuous form paper (or continuous stationery)

10234-744: The international trade centers in this route. The Maritime Silk Road or Maritime Silk Route is the maritime section of the historic Silk Road that connected Southeast Asia , East Asia , the Indian subcontinent , the Arabian Peninsula , eastern Africa , and Europe . It began by the 2nd century BCE and flourished until the 15th century CE. The Maritime Silk Road was primarily established and operated by Austronesian sailors in Southeast Asia who sailed large long-distance ocean-going sewn-plank and lashed-lug trade ships . The route

10353-433: The intricate web of land and sea routes connecting Central , East , South , Southeast , and West Asia as well as East Africa and Southern Europe . The Silk Road derives its name from the highly lucrative trade of silk textiles that were primarily produced in China. The network began with the expansion of the Han dynasty (202 BCE – 220 CE) into Central Asia around 114 BCE, through

10472-789: The journey by sea from various points. Crossing the high mountains, it passed through northern Pakistan , over the Hindu Kush mountains, and into Afghanistan , rejoining the northern route near Merv, Turkmenistan . From Merv, it followed a nearly straight line west through mountainous northern Iran , Mesopotamia , and the northern tip of the Syrian Desert to the Levant , where Mediterranean trading ships plied regular routes to Italy , while land routes went either north through Anatolia or south to North Africa . Another branch road travelled from Herat through Susa to Charax Spasinu at

10591-414: The later stages of the machine. Wove paper does not exhibit "laidlines", which are small regular lines left behind on paper when it was handmade in a mould made from rows of metal wires or bamboo. Laidlines are very close together. They run perpendicular to the "chainlines", which are further apart. Handmade paper similarly exhibits "deckle edges", or rough and feathery borders. Paper can be produced with

10710-424: The latter. Besides the fibres, pulps may contain fillers such as chalk or china clay , which improve its characteristics for printing or writing. Additives for sizing purposes may be mixed with it or applied to the paper web later in the manufacturing process; the purpose of such sizing is to establish the correct level of surface absorbency to suit ink or paint. The pulp is fed to a paper machine, where it

10829-460: The maritime spice networks between Southeast Asia and South Asia , and the West Asian maritime networks in the Arabian Sea and beyond, coinciding with these ancient maritime trade roads by the current era. Austronesian thalassocracies controlled the flow of trade in the eastern regions of the Maritime Silk Road, especially the polities around the straits of Malacca and Bangka ,

10948-425: The maritime route faced different perils like weather and piracy , but they were not affected by political instability and could simply avoid areas in conflict. Central Eurasia has been known from ancient times for its horse riding and horse breeding communities, and the overland Steppe Route across the northern steppes of Central Eurasia was in use long before that of the Silk Road. Archeological sites, such as

11067-424: The massive introduction of digital technologies. Paper has a major role in the visual arts. It is used by itself to form two- and three-dimensional shapes and collages . It has also evolved to being a structural material used in furniture design. Watercolor paper has a long history of production and use. The thickness of paper is often measured by caliper, which is typically given in thousandths of an inch in

11186-462: The mid-15th century. Spanning over 6,400 km (4,000 mi), it played a central role in facilitating economic, cultural, political, and religious interactions between the Eastern and Western worlds . The name "Silk Road" was first coined in the late 19th century, but some 20th- and 21st-century historians instead prefer the term Silk Routes , on the grounds that it more accurately describes

11305-519: The missions and explorations of the Chinese imperial envoy Zhang Qian , which brought the region under unified control . The Chinese took great interest in the security of their trade products, and extended the Great Wall of China to ensure the protection of the trade route. By the first century CE, Chinese silk was widely sought-after in Rome, Egypt, and Greece. Other lucrative commodities from

11424-519: The new packaging has mechanical properties very similar to those of some expanded plastic packaging, but is biodegradable and can also be recycled with ordinary paper. With increasing environmental concerns about synthetic coatings (such as PFOA ) and the higher prices of hydrocarbon based petrochemicals, there is a focus on zein (corn protein) as a coating for paper in high grease applications such as popcorn bags. Also, synthetics such as Tyvek and Teslin have been introduced as printing media as

11543-468: The office and the home are A4 and A3 (A3 is the size of two A4 sheets). The density of paper ranges from 250 kg/m (16 lb/cu ft) for tissue paper to 1 500  kg/m (94 lb/cu ft) for some specialty paper. Printing paper is about 800 kg/m (50 lb/cu ft). Paper may be classified into seven categories: Some paper types include: Much of the early paper made from wood pulp contained significant amounts of alum ,

11662-529: The other going north of the Tian Shan mountains through Turpan , Talgar , and Almaty (in what is now southeast Kazakhstan ). The routes split again west of Kashgar, with a southern branch heading down the Alai Valley towards Termez (in modern Uzbekistan) and Balkh (Afghanistan), while the other travelled through Kokand in the Fergana Valley (in present-day eastern Uzbekistan) and then west across

11781-431: The overland Silk Road, and thus should not be viewed as a mere extension of it. Traders traveling through the Maritime Silk Road could span the entire distance of the maritime routes, instead of through regional relays as with the overland route. Ships could carry far larger amounts of goods, creating greater economic impact with each exchange. Goods carried by the ships also differed from goods carried by caravans. Traders on

11900-464: The overland routes, which prompted European polities to seek alternatives while themselves gaining leverage over their trade partners. This marked the beginning of the Age of Discovery , European colonialism , and the further intensification of globalization . In the 21st century, the name "New Silk Road" is used to describe several large infrastructure projects along many of the historic trade routes; among

12019-524: The past 40 years leading to increase in deforestation , with 35% of harvested trees being used for paper manufacture. Most paper companies also plant trees to help regrow forests. Logging of old growth forests accounts for less than 10% of wood pulp, but is one of the most controversial issues. Paper waste accounts for up to 40% of total waste produced in the United States each year, which adds up to 71.6 million tons of paper waste per year in

12138-428: The presence of alum eventually degrades the fibres until the acidic paper disintegrates in a process known as " slow fire ". Documents written on rag paper are significantly more stable. The use of non-acidic additives to make paper is becoming more prevalent, and the stability of these papers is less of an issue. Paper made from mechanical pulp contains significant amounts of lignin , a major component in wood. In

12257-428: The presence of light and oxygen, lignin reacts to give yellow materials, which is why newsprint and other mechanical paper yellows with age. Paper made from bleached kraft or sulfite pulps does not contain significant amounts of lignin and is therefore better suited for books, documents and other applications where whiteness of the paper is essential. Paper made from wood pulp is not necessarily less durable than

12376-503: The public until the 20th century. The first book entitled The Silk Road was by Swedish geographer Sven Hedin in 1938. The use of the term 'Silk Road' is not without its detractors. For instance, Warwick Ball contends that the maritime spice trade with India and Arabia was far more consequential for the economy of the Roman Empire than the silk trade with China , which at sea was conducted mostly through India and on land

12495-529: The silkworm eggs , resulting in silk production in the Mediterranean, particularly in Thrace in northern Greece, and giving the Byzantine Empire a monopoly on silk production in medieval Europe. In 568, the Byzantine ruler Justin II was greeted by a Sogdian embassy representing Istämi , ruler of the First Turkic Khaganate , who formed an alliance with the Byzantines against Khosrow I of

12614-513: The trade route against nomadic bandit forces generally identified as Xiongnu . Han general Ban Chao led an army of 70,000 mounted infantry and light cavalry troops in the 1st century CE to secure the trade routes, reaching far west to the Tarim Basin. Ban Chao expanded his conquests across the Pamirs to the shores of the Caspian Sea and the borders of Parthia . It was from here that

12733-506: The trades of marauders or mercenaries. "Many barbarian tribes became skilled warriors able to conquer rich cities and fertile lands and to forge strong military empires." The Sogdians dominated the east–west trade after the 4th century up to the 8th century. They were the main caravan merchants of Central Asia. A.V. Dybo noted that "according to historians, the main driving force of the Great Silk Road were not just Sogdians, but

12852-532: The veracity of this story is uncertain, paper started to be made in Samarkand soon after. In the 13th century, the knowledge and uses of paper spread from the Middle East to medieval Europe , where the first water-powered paper mills were built. Because paper was introduced to the West through the city of Baghdad , it was first called bagdatikos . In the 19th century, industrialization greatly reduced

12971-609: The way. In addition to goods, the network facilitated an unprecedented exchange of religious ( especially Buddhist ), philosophical, and scientific thought, much of which was syncretised by societies along the way. Likewise, a wide variety of people used the routes. Diseases such as plague also spread along the Silk Road, possibly contributing to the Black Death. From 1453 onwards, the Ottoman Empire began competing with other gunpowder empires for greater control over

13090-537: The world." In exchange, the caravans sent back bolts of silk brocade , lacquer-ware , and porcelain . The southern route or Karakoram route was mainly a single route from China through the Karakoram mountains, where it persists in modern times as the Karakoram Highway , a paved road that connects Pakistan and China . It then set off westwards, but with southward spurs so travelers could complete

13209-410: The yield as chemical pulping, mechanical pulps is often cheaper. Mass-market paperback books and newspapers tend to use mechanical papers. Book publishers tend to use acid-free paper , made from fully bleached chemical pulps for hardback and trade paperback books. The production and use of paper has a number of adverse effects on the environment. Worldwide consumption of paper has risen by 400% in

13328-580: Was also utilized by the dhows of the Persian and Arab traders in the Arabian Sea and beyond, and the Tamil merchants in South Asia . China also started building their own trade ships ( chuán ) and followed the routes in the later period, from the 10th to the 15th centuries CE. The network followed the footsteps of older Austronesian jade maritime networks in Southeast Asia, as well as

13447-617: Was excavated and found to have not only Greek bronzes but also Chinese silks. Similar animal-shaped pieces of art and wrestler motifs on belts have been found in Scythian grave sites stretching from the Black Sea region all the way to Warring States era archaeological sites in Inner Mongolia (at Aluchaideng) and Shaanxi (at Keshengzhuang  [ de ] ) in China. The expansion of Scythian cultures, stretching from

13566-477: Was first adopted in Germany in 1922 and generally spread as nations adopted the metric system. The largest standard size paper is A0 (A zero), measuring one square metre (approx. 1189 × 841 mm). A1 is half the size of a sheet of A0 (i.e., 594 mm × 841 mm), such that two sheets of A1 placed side by side are equal to one sheet of A0. A2 is half the size of a sheet of A1, and so forth. Common sizes used in

13685-537: Was handled by numerous intermediaries such as the Sogdians . Going as far as to call the whole thing a "myth" of modern academia, Ball argues that there was no coherent overland trade system and no free movement of goods from East Asia to the West until the period of the Mongol Empire . He notes that traditional authors discussing east–west trade such as Marco Polo and Edward Gibbon never labelled any route

13804-700: Was initially formulated during the reign of Emperor Wu of Han (141–87 BCE), it was reopened by the Tang Empire in 639 when Hou Junji conquered the Western Regions , and remained open for almost four decades. It was closed after the Tibetans captured it in 678, but in 699, during Empress Wu 's period, the Silk Road reopened when the Tang reconquered the Four Garrisons of Anxi originally installed in 640, once again connecting China directly to

13923-418: Was introduced from Central Asia, and Chinese jade carvers began to make imitation designs of the steppes, adopting the Scythian -style animal art of the steppes (depictions of animals locked in combat). This style is particularly reflected in the rectangular belt plaques made of gold and bronze, with other versions in jade and steatite . An elite burial near Stuttgart , Germany, dated to the 6th century BCE,

14042-474: Was invented by German jurist Justus Claproth in 1774. Today this method is called deinking . It was not until the introduction of wood pulp in 1843 that paper production was not dependent on recycled materials from ragpickers . The word paper is etymologically derived from Latin papyrus , which comes from the Greek πᾰ́πῡρος ( pápūros ), the word for the Cyperus papyrus plant. Papyrus

14161-487: Was moved further east during the Later Han to Luoyang . The route was defined around the 1st century BCE when Han Wudi put an end to harassment by nomadic tribes. The northern route travelled northwest through the Chinese province of Gansu from Shaanxi Province and split into three further routes, two of them following the mountain ranges to the north and south of the Taklamakan Desert to rejoin at Kashgar , and

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