Printing the first layer of 4-color gum print on a paper attached to aluminum.
Mixing the the sensitizer for the first gum layer. There will be 3 ml of the stock pigment + 6 ml gum + 4 ml distilled water + 4 ml potassium dichromate 13% + Tween 20 1:3 2 drops — that makes 17 ml of the sensitizer in total, for a 26 by 42 cm print.
Coating the paper with the first pigment layer, ivory black in this case.
Registering and taping down the negative for the black layer.
Exposing in a vacuum frame of a plateburner.
Developing the print in water after the exposure.
The first layer (ivory black) of the gum print.
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