15 janv. 1878 - 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
Ajouté au bande de temps:
Date:
15 janv. 1878
Maintenaint
~ Il y a 147 ans