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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| History of printing | 7/16 | https://en.wikipedia.org/wiki/History_of_printing | reference | science, encyclopedia | 2026-05-05T04:00:12.806227+00:00 | kb-cron |
=== Wooden movable type === Bi Sheng also developed wooden movable type, but it was abandoned in favor of ceramic types due to the presence of wood grains and the unevenness of the wooden type after being soaked in ink. However wooden movable type had evidently reached the Tangut Western Xia to the west by the 12th century. There, the Tanguts printed the Auspicious Tantra of All-Reaching Union, a 449-page text considered to be the earliest extant example of a text printed using the wooden movable type. The Auspicious Tantra texts were found in the ruins of the Baisigou Square Pagoda in the Helan Mountains, Ningxia. They feature traits of movable type texts such as identical length bar lines, some characters printed upside down, different shades of ink, and interlaced lines. Another Tangut text known as the Avatamsaka Sutra contains descriptions of the merits of wooden movable type such as a "vow to carve individual characters", "those engaged in typesetting are virtuous", and "those engaged in carving characters and printing are intelligent and can expect to have their wishes fulfilled". The text shows traits of movable type such as correcting mistakes by directly overlaying incorrect characters with the correct ones. Twelve Tangut titles printed in movable type survive to this day. The Uyghurs too seem to have used wooden movable type although it is unknown where they got the technology. In 1908, more than a thousand pieces of Uyghur type made of wood, engraved in Sogdian script, were discovered in Dunhuang. They are believed to date to the 12th century when the Uyghurs also made use of woodblock printing. To date no manuscripts or fragments of Uyghur movable type have been found. Wang Zhen, who lived in the Yuan dynasty, also described the wooden movable type in his Book of Agriculture (Nongshu 農書) of 1313.
Now, however, there is another method [beyond earthenware type] that is both more exact and more convenient. A compositor's form is made of wood, strips of bamboo are used to mark the lines and a block is engraved with characters. The block is then cut into squares with a small fine saw till each character forms a separate piece. These separate characters are finished off with a knife on all four sides, and compared and tested till they are exactly the same height and size. Then the types are placed in the columns [of the form] and bamboo strips which have been prepared are pressed in between them. After the types have all been set in the form, the spaces are filled in with wooden plugs, so that the type is perfectly firm and will not move. When the type is absolutely firm, the ink is smeared on and printing begins. Wang Zhen used two rotating circular tables as trays for laying out his type. The first table was separated into 24 trays in which each movable type was categorized based on a number corresponding with a rhyming pattern. The second table contained miscellaneous characters. Using more than 30,000 wooden movable types, Wang Zhen printed a hundred copies of his county gazetteer, Records of Jingde County (Jingde xianzhi 旌德縣志), a text containing more than 60,000 characters. Wooden movable type printing became relatively common during the Ming dynasty and became widespread during the Qing dynasty.
=== Metal movable type ===
Metal movable type appeared in the late Song and Yuan dynasties. Bronze movable types were used to print banknotes and official documents by both the Song and Jin. In the Jin dynasty, copper-block prints were slotted with two square holes for embedding bronze movable type characters, each selected from 1000 different characters, such that each printed paper money had a different combination of markers. A copper block printed paper banknote dated between 1215 and 1216 in the collection of Luo Zhenyu's Pictorial Paper Money of the Four Dynasties, 1914, shows two special characters: one called Ziliao, the other called Zihao, for the purpose of preventing counterfeit. Over the Ziliao there is a small character (輶) printed with movable copper type, while over the Zihao there is an empty square hole; apparently the associated copper metal type was lost. Another sample of Song dynasty money of the same period in the collection of Shanghai Museum has two empty square holes above Ziliao as well as Zihou, due to the loss of two copper movable types. In 1234, cast metal movable type was used in Goryeo (Korea) to print the 50-volume Prescribed Texts for Rites of the Past and Present, compiled by Ch'oe Yun-ŭi, but no copies survived to the present. Ch'oe Yun-ŭi built on an earlier Chinese method of creating movable type; he adapted a method for minting bronze coins to cast three-dimensional characters in metal. Because of the length of the text Ch'oe Yun-ŭi did not complete the project until 1250. The oldest extant book printed with movable metal type is the Jikji, printed in 1377. Tin movable type is mentioned in Wang Zhen's Zao Huozi Yinshufa (造活字印書法) of 1298, but it was considered unsatisfactory due to incompatibility with the inking process. Only in the late 15th century did bronze movable type begin to be widely used in China.
=== Impact of movable type in the Sinosphere ===