heliotypy


he·li·o·type

H0132300 (hē′lē-ə-tīp′)n.1. A photomechanically produced plate for pictures or type made by exposing a gelatin film under a negative, hardening it with chrome alum, and printing directly from it.2. also he·li·o·typ·y (-tī′pē) The process of producing a heliotype.
he′li·o·type′ v.he′li·o·typ′ic (-tĭp′ĭk) adj.

heliotypy

the process of making pictures by printing directly from gelatin film that has been exposed under a negative and fixed with chrome alum.See also: Photography