Gum Bichromate
A hand-coated printing process mixing gum arabic, pigment and light-sensitive bichromate. Pictorialist photographers such as Robert Demachy favored it in the 1890s because it let them paint, scrub and layer an image like a drawing.
Spot it
- 01Soft painterly brush texture
- 02Muted layered pigment color
- 03Uneven hand-coated borders
Why it happens
Bichromate hardens the gum where light strikes it; unexposed gum washes away, and the pigment held in the hardened gum forms a tonal image that can be rebuilt in layers.
Recreate it in Pixio
Image edit prompt“Reprint this image as a gum bichromate print on textured watercolor paper: soft, painterly detail, muted earthy pigment in layered washes, slightly grainy shadows, brush marks visible in the coating, uneven hand-painted borders and gentle misregistration between color layers. Avoid sharp digital detail. Keep the original subject and composition.”
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