Modern printing processes : gum bichromate and platinotype papers
A photography manual by Henry G. Abbott, published in Chicago in 1900, covering gum bichromate and platinotype printing for amateur and working photographers. Its plates show hand-held darkroom and process equipment, a wooden printing frame, tubes of pigment, and a finished portrait print, which a designer could use as reference for vintage process imagery, photographic apparatus, or hand-darkroom details.
