Abstract
The purpose of this paper is to introduce the major reprographic processes from the past two centuries and present specific information on each to aid in identification, maintenance, and care. For each process discussed, the author will present the following: other known terminology that is closely linked to that process; the dates that the process was invented; known dates of commercial application; identifying characteristics; the general durability of both the paper support and the process over time including flexibility and absence of brittleness; the contrast between the image areas and the background; any harmful chemical residues that may cause damage to the material itself or to adjacent materials; and any known adverse reactions to alkaline or acidic environments, other reprographic processes, or preservation treatments. Processes include copybooks and roller copiers; carbon paper; hectographs; stencil duplication; photostatic prints; spirit duplication; diazo prints; Xerography; diffusion transfer; thermography; carbonless paper; Electrofax; and color photocopies.
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