1) Albertype 2) Artotype 3) Hectograph 4) Heliotype 1) Collotype printing 2) Photogelatin process 3) Planographic printing 4) Planography 
• (n.) 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 ...
photomechanical printing process that gives accurate reproduction because no halftone screen is employed to break the images into dots. In the ... [3 related articles]
Method of printing continuous tones using a plate coated with gelatin.
A photomechanical printing process. Printing is done from a raised gelatine film on a glass support. Used mostly in early photographs.
Continuous-tone printing process using a gelatine coated printing plate.
Col'lo·type noun [ Greek ... 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. Af...
A photomechanical method for reproducing photographic images
[n] - a kind of color printing, used for the finest facsimile reproductions of works of art
collotype printing noun a photomechanical printing process that uses a glass plate with a gelatin surface that carries the image to be reproduced; can be used with one or more colors