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Stack #174095

processing

QuestionAnswer
4 stages of processing development,fixing,washing,drying
what is the purpose of development? to convert an invisible image to latent image
exposed silver halide grains are reduced to what? metallic silver
good developer acts more quickly on exposed grains or unexposed grains? exposed
if given sufficient time in developer, all Ag halide is reduced to what? silver
when unexposed crystals are reduced it creates? fog
development provides optical density and radiographic contrast
silver bromide grain is surrounded by a barrier to protect it from what? electrons in the developing solution
exposed silver bromide grains possess a weakness in he charge barrier caused by what? presence of neutral silver atoms which have collected at the sensitivity speck
the development center enables electrons from the developer to do what? penetrate the grain and reduce all its silver ions to metallic silver
elevated temperature and high pH concentration in the developer causes ? chemical fog
chemical fog results in ? increased density and decreased contrast
what happens when the developer becomes oxidized? the developer becomes depleted of electrons
when no development takes place but there is a reaction with atmospheric oxygen, this is called? aerial oxidation
how does aerial oxidation affect the supply of reducing agent? the supply becomes exhausted
Created by: MLENNOX
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