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Excerpt from A Dictionary of Terms Used in PrintingA printed page, an engraving, or a bank note may be exactly copied by this invention. Moisten the printed paper with dilute phosphoric acid, lay it face downwards on a clean sheet of Zinc, and put it in a press for a short time. The acid of the unprinted part etches the zinc beneath, while the printed part sets off on the

Title : A Dictionary of Terms Used in Printing (Classic Reprint)
Author : H Morgan
Language : en
Rating :
4.90 out of 5 stars
Type : PDF, ePub, Kindle
Uploaded : Apr 03, 2021

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