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gum bichromate process

noun
1.
a contact printing method in which the image is formed on a coating of sensitized gum containing a suitable colored pigment and potassium or ammonium dichromate.
Also called gum dichromate process.
Origin
1895-1900
1895-1900
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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