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Chemical used after developing and before washing to remove remaining light-sensitive halides by converting them into soluble salts. An image becomes stable to light once it's fixed.
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A chemical substance such as a stop bath or fixer with a pH below 7 that's used to stop film or paper development.
A fast fixing bath that includes ammonium thiosulphate or thiocyanate.
The light sensitive ingredient in photographic film and papers that is a combination of silver with bromine, fluorine, chlorine or iodine. Exposed silver halide particles form metallic silver that turns black when developed. Unexposed particles are dissolved by the fixer, leaving a permanent image.
An acidic bath that is used after the developer to stop development and reduce fixer contamination.