collotype

[kol-uh-tahyp]
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:
1880–85; < Greek kóll(a) glue + -o- + -type

collotypic [kol-uh-tip-ik] , adjective
collotypy [kol-uh-tahy-pee] , noun
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World English Dictionary
collotype (ˈkɒləʊˌtaɪp)
 
n
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
 
[C19: from Greek kolla glue + type]
 
collotypic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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Encyclopedia Britannica
Encyclopedia

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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Example sentences
Seven of the illustrations will be in color, and there will be many others in photogravure and collotype.
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