Carbon paper was widely used.
There are many places where one can sell used photocopiers that still work online. There are companies, such as "brkassociates" and "copexinc", that will buy used photocopiers.
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The following websites sell photocopiers online: Xerox, Staples, Office Depot, and Amazon (among others). It is also possible to find listings for used photocopiers through local Craigslist listings or going-out-of-business sales.
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Most raw materials have to be refined before they can be used.
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photoconductive polymers are materials that change their electrical conductivity when subject to light (infra red- visible - ultraviolet - gamma). They are mainly used in photocopiers and holography.
Toner is used in laser printers and photocopiers.
Toner is a powder used in laser printers and photocopiers to form the text and images on the printed paper. In its early form it was simply carbon powder. Then, to improve the quality of the printout the carbon was blended with a polymer.
The gestetner device was invented by a man with the last name Gestetner. It is used to "duplicate" objects using a stencil like format and wax as well as other materials.
Before the urethane wheel it was Clay wheels
a machine used to duplicate sorts of documents