jan 15, 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
Added to timeline:
Date:
jan 15, 1878
Now
~ 148 years ago