Editing Duplicating machines (section)

==Mimeographs==

{{main|Mimeograph}}
[[File:Mimeograph, 1918.png|right|thumb|250px|1918 illustration of a mimeograph machine.]]
The [[mimeograph]] invented by [[Albert Blake Dick]] in 1884 used heavy waxed-paper "stencils" that a pen or a typewriter could cut through.  The stencil was wrapped around the drum of the (manual or electrical) machine, which forced [[ink]] out through the cut marks on the stencil. The [[paper]] had a surface texture (like bond paper), and the ink was black and odorless. A person could use special knives to cut stencils by hand, but handwriting was impractical, because any closed loop letterform would cut a hole and thus print as a black blob. The technology was soon refined to control this problem, also allowing the use of [[typewriter]]s to prepare mimeograph masters. If the user put the stencil on the drum wrong-side-out, the copies came out mirror-imaged.