10 agos 1869 año - Hectograph

Descripción:

This machine was created in 1869 and is used to create a "master copy". This machine is now rarely ever used, however requires preparation of the master paper, which the copy is drawn, written or another method onto the paper. This sheet is then pressed against a moist gelatin surface and the image is reversed. Sheets of paper then pressed against the gelatin receives an impression of this image

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