A process to make photographic prints using a colloid emulsion of bichromated gum arabic as the binder and pigment as the final image material. The image is formed as the emulsion hardens in relation to exposure and is developed by washing away the unhardened emulsion to reveal the support, forming the highlights and midtones.
AAT
300053501
bi-gum
bi-gum process
bichromate, gum
gum bichromate
gum bichromate method
gum bichromate printing
gum bichromate printing process
gum printing
gum process
gum-bichromate
gum-bichromate process
gum-pigment process
printing, gum
13yrs ago
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