15 Jan 1878 Jahr - Photogravure is an intaglio printmaking or photo-mechanical process whereby a copper plate is coated with a light-sensitive gelatin tissue which had been exposed to a film positive, and then etched, resulting in a high quality intaglio print that can reproduce the detail and continuous tones of a photograph
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Datum:
15 Jan 1878 Jahr
Jetzt
~ 147 years ago