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more about collotype
collotype |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Collotype \Col"lo*type\, n. [Gr. ? glue + -type.] A photomechanical print made directly from a hardened film of gelatin or other colloid; also the process of making such prints. According to one method, the film is sensitized with potassium dichromate and exposed to light under a reversed negative. After the dichromate has been washed out the film is soaked in glycerin and water. As this treatment causes swelling in those parts of the film which have been acted on by light, a plate results from which impressions can be taken with prepared ink. The albertype, phototype, and heliotype are collotypes. From WordNet r 1.6 [wn]: collotype n : a kind of color printing, used for the finest facsimile reproductions of works of art [syn: {collotype printing}, {photogelation process}]
more about collotype
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