Glossary of Printing Terms:
Gum-Bichromate Print

The gum-bichromate process was popular among pictorialists like Steichen and Demachy for its painterly qualities.

Gum prints are produced by brushing onto a sheet of textured paper a gum arabic solution mixed with potassium bichromate and a suitable pigment. When dry, the sheet is exposed in contact with a negative.

The print is then developed during which the photographer can manipulate the print with a brush, sponge or spray of water. Multiple gum prints, usually more than one color, are made by additional printings of the same negative, in register, on the original sheet.


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