A process or device used for the duplication of small documents utilizing a gelatin-based surface to which an original has been transferred. Rather like a mimeograph, a hectograph process is used for very small runs of memos, letters, etc.
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A process or device used for the duplication of small documents utilizing a gelatin-based surface to which an original has been transferred. Rather like a mimeograph, a hectograph process is used for very small runs of memos, letters, etc.