hydrotype

noun
hy·dro·type

Definition of hydrotype 

: a positive printing process in photography that uses a gelatin-coated plate containing dichromate on which appears after the plate has been exposed to light under a positive and then soaked in a dye solution a positive image of dye that is transferred to a sheet of paper coated with soft gelatin

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History and Etymology for hydrotype

International Scientific Vocabulary hydr- + type

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