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May 31, 2025 - June 1, 2025
9:30 am - 4:30 pm
ABOUT GUM BICHROMATE Gum Bichromate process allows colour printing from black & white contact negatives in numerous colours. Paper is coated with pigment, dichromate and gum Arabic, registered, exposed to ultraviolet light. Exposure to light hardens the gum Arabic proportionate to the varying density of the negative.The print is then placed in a bath of (more…)