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Ceramic movable type[edit]

Bi Sheng (毕昇/畢昇) (990–1051) developed the first known movable-type system for printing in China around 1040 AD during the Northern Song dynasty, using ceramic materials.^[15][16] As described by the Chinese scholar Shen Kuo (沈括) (1031–1095):

When he wished to print, he took an iron frame and set it on the iron plate. In this he placed the types, set close together. When the frame was full, the whole made one solid block of type. He then placed it near the fire to warm it. When the paste [at the back] was slightly melted, he took a smooth board and pressed it over the surface, so that the block of type became as even as a whetstone.

For each character there were several types, and for certain common characters there were twenty or more types each, in order to be prepared for the repetition of characters on the same page. When the characters were not in use he had them arranged with paper labels, one label for each rhyme-group, and kept them in wooden cases.

If one were to print only two or three copies, this method would be neither simple nor easy. But for printing hundreds or thousands of copies, it was marvelously quick. As a rule he kept two forms going. While the impression was being made from the one form, the type was being put in place on the other. When the printing of the one form was finished, the other was then ready. In this way the two forms alternated and the printing was done with great rapidity.^[15]

In 1193, Zhou Bida, an officer of Southern Song Dynasty, made a set of clay movable-type method according to the method described by Shen Kuo in his Dream Pool Essays, and printed his book Notes of The Jade Hall (《玉堂雜記》).^[17]

The claim that Bi Sheng's clay types were "fragile" and "not practical for large-scale printing" and "short lived"^[18] was refuted by facts and experiments. Bao Shicheng (1775–1885) wrote that baked clay moveable type was "as hard and tough as horn"; experiments show that clay type, after being baked in an oven, becomes hard and difficult to break, such that it remains intact after being dropped from a height of two metres onto a marble floor. The length of clay movable types in China was 1 to 2 centimetres, not 2mm, thus hard as horn. But similar to metal type, ceramic type did not hold Chinese ink well, and had an added disadvantage of uneven matching of the type which could sometimes result from the uneven changes in size of the type during the baking process. ^[19]

There has been an ongoing debate regarding the success of ceramic printing technology as there have been no printed materials found with ceramic movable types. However, it is historically recorded to have been used as late as 1844 in China from the Song dynasty through the Qing dynasty.^[17][20]:22

 

Wooden movable type[edit]

Bi Sheng (990–1051) also pioneered the use of wooden movable type around 1040 AD, as described by the Chinese scholar Shen Kuo (1031–1095). However, this technology was abandoned in favour of clay movable types due to the presence of wood grains and the unevenness of the wooden type after being soaked in ink.^[15][21]

 

A revolving typecase for wooden type in China, from Wang Zhen's book published in 1313

In 1298, Wang Zhen (王祯/王禎), a Yuan dynasty governmental official of Jingde County, Anhui Province, China, re-invented a method of making movable wooden types. He made more than 30,000 wooden movable types and printed 100 copies of Records of Jingde County (《旌德縣志》), a book of more than 60,000 Chinese characters. Soon afterwards, he summarized his invention in his book A method of making moveable wooden types for printing books. Although the wooden type was more durable under the mechanical rigors of handling, repeated printing wore the character faces down, and the types could only be replaced by carving new pieces. This system was later enhanced by pressing wooden blocks into sand and casting metal types from the depression in copper, bronze, iron or tin. This new method overcame many of the shortcomings of woodblock printing. Rather than manually carving an individual block to print a single page, movable type printing allowed for the quick assembly of a page of text. Furthermore, these new, more compact type fonts could be reused and stored.^[15][16] The set of wafer-like metal stamp types could be assembled to form pages, inked, and page impressions taken from rubbings on cloth or paper.^[16] In 1322，a Fenghua county officer Ma Chengde (馬称德) in Zhejiang, made 100,000 wooded movable types and printed the 43-volume Daxue Yanyi (《大學衍義》). Wooden movable types were used continually in China. Even as late as 1733, a 2300-volume Wuying Palace Collected Gems Edition (《武英殿聚珍版叢書》) was printed with 253,500 wooden movable types on order of the Qianlong Emperor, and completed in one year.

A number of books printed in Tangut script during the Western Xia (1038–1227) period are known, of which the Auspicious Tantra of All-Reaching Union that was discovered in the ruins of Baisigou Square Pagoda in 1991 is believed to have been printed sometime during the reign of Emperor Renzong of Western Xia (1139–1193).^[22] It is considered by many Chinese experts to be the earliest extant example of a book printed using wooden movable type.^[23]

If one used movable type to produce multiple copies of the same document, the speed of printing would increase relatively.^{[15]:201[better source needed]}

所有跟帖： 

• 活字印刷适合字母文字 -akuan- ♂ (0 bytes) () 12/22/2019 postreply 13:54:20

• 技术当时是真实存在的。 -huntridge- ♂ (0 bytes) () 12/22/2019 postreply 13:55:26