photogelatin process

Từ điển WordNet v3.1 - WordNet Dictionary

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
• Syn:
collotype, collotype printing
• Hypernyms:
planographic printing, planography
• Hyponyms:
hectograph, heliotype