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collotype

[kol-uh-tahyp] /ˈkɒl əˌtaɪp/
noun, Also called albertype, artotype, heliotype
1.
any photomechanical process of printing from a plate coated with gelatin.
2.
the plate used for this.
3.
a print made from such a plate.
verb (used with object), collotyped, collotyping.
4.
to produce (a print) by collotype; albertype; artotype; heliotype.
Origin
1880-1885
1880-85; < Greek kóll(a) glue + -o- + -type
Related forms
collotypic
[kol-uh-tip-ik] /ˌkɒl əˈtɪp ɪk/ (Show IPA),
adjective
collotypy
[kol-uh-tahy-pee] /ˈkɒl əˌtaɪ pi/ (Show IPA),
noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for collotypy

collotype

/ˈkɒləʊˌtaɪp/
noun
1.
Also called photogelatine process. a method of lithographic printing from a flat surface of hardened gelatine: used mainly for fine-detail reproduction in monochrome or colour
2.
a print made using this process
Derived Forms
collotypic (ˌkɒləˈtɪpɪk) adjective
Word Origin
C19: from Greek kolla glue + type
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Encyclopedia Article for collotypy

collotype

photomechanical printing process that gives accurate reproduction because no halftone screen is employed to break the images into dots. In the process, a plate (aluminum, glass, cellophane, etc.) is coated with a light-sensitive gelatin solution and exposed to light through a photographic negative. The gelatin is hardened in exposed areas and is then soaked in glycerin, which is absorbed most in the non-hardened areas. When exposed to high humidity, these areas absorb moisture and repel the greasy ink. The hardened areas accept the ink, and the plate can be used to print a few thousand copies of the positive image

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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