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This is a partial list of text and image duplicating processes used in business and government from the Industrial Revolution forward. Some are mechanical and some are chemical. Some are mechanical and some are chemical.
Duplicating machines, machines and processes designed to reproduce printed material, photocopying being among the best-known today; see also List of duplicating processes Loop bin duplicator , a device designed to copy pre-recorded audio tapes
Duplicating machines were the predecessors of modern document-reproduction technology. They have now been replaced by digital duplicators, scanners , laser printers , and photocopiers , but for many years they were the primary means of reproducing documents for limited-run distribution.
A mimeograph machine (often abbreviated to mimeo, sometimes called a stencil duplicator or stencil machine) was a low-cost duplicating machine that worked by forcing ink through a stencil onto paper. [1] The process was called mimeography, and a copy made by the process was a mimeograph.
Care needed to be taken that the gelatin surface was kept clean, and not damaged (e.g. by fingernails) during duplicating. Although the name " hecto-graph " implies production of 100 copies, in reality the gelatin process produced print runs of somewhere between 20 and 80 copies, depending upon the skill of the user and the quality of the original.
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In the United States, the industry is a relatively small industry, with approximately 3000 firms.It comprises entrepreneurial businesses serving predominantly the large- and wide-format reproduction needs of the legal, architectural, engineering, manufacturing, retail, and advertising industries.
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