1592953035000 1029974400000 term-28982 1616541106026 1312632519000 1616290596226 adlib fitz-online adlib-term-28982 3b273ea5-7688-3b46-be02-289b8cb2113f 2 1 scope note Photographic processes based on the photosensitivity of certain iron compounds. Usually require intense light and thus employ contact printing. Do not use when iron sulfate is used to develop a silver image. K.KT.AFU.ALO.DOI.EFQ.ALO.CFS 1 code K.KT.AFU.ALO.DOI.EFQ.ALO.CFS 1 iron processes reference term-27996 adlib-term-27996 7d99d17f-3b25-3dd4-946e-4f3da59a2dbc photographic process reference term-29295 adlib-term-29295 f423768a-16e8-39fd-a541-8e59fd61b415 ferrogallic process iron processes term