When was the copier widely used in China?

Since the beginning of the 20th century, copiers have been widely used in China. At the beginning of the 20th century, the blueprint method and diazotization method were mainly used to copy documents and drawings. Diazotization method is more convenient, faster and more widely used than blueprint method.

In the 1960s, we began to study color copying, and the method used was basically decomposition of three primary colors, and adding black became four-color copying. At the end of 1970s, a research report on the color imaging of electrophoretography was published at the third international electrostatic photography conference, which was a step forward than the previous method. In the 1990s, the laser color copier reappeared.

Extended data:

1966 65438+ 10 "Tianjin Institute of Reproduction Technology of State Science and Technology Commission" (Tianfu Institute for short) was established. 1966 Tianjin experimental factory (under the fourth machinery department) successfully copied the imported xerox large electrostatic copier; Tianfu Institute cooperated with Shanghai Photographic Equipment Factory to successfully trial-produce three kinds of copiers, and successively produced nearly 700 sets. In addition, 3-4 units have also developed photocopiers. By the end of 1960s, diazo copier was still the main copying machinery product in China.

1973 to 1983 Due to the market demand, the Ministry of Machinery Industry arranged Shanghai Copier Factory, Tianjin Copier Factory, Wuhan Copier Factory, Xi 'an Instrument Factory, Chongqing Shuguang Instrument Factory, Guilin Electric Meter Factory, Qingdao Copier Factory and Yingkou Copier Factory to produce electrostatic copying equipment.