01 A plate the film of which retains its sensitiveness only while wet. The film used in such plates is of collodion impregnated with bromides …
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1.
A plate the film of which retains its sensitiveness only while wet. The film used in such plates is of collodion impregnated with bromides and iodides. Before exposure the plate is immersed in a solution of silver nitrate, and immediately after exposure it is developed and fixed.(Photog.)