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DEVELOPMENTWHAT IT IS AND WHAT IT DOES
Phenidone fine grain developer 196
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20 grains 40 ounces acetic acid agitation alkali Amidol ammonium anti-fogging bisulphite borax chemical chrome alum colour concentration containing contrast dark-room density desensitiser developer solution developing agents developing tank diluted dish dissolved effect emulsion exposed exposure filter fine-grain developers fixing bath fixing solution fore-bath formulae gamma gelatine gradation grain developers grains 1 gram grams per litre grams Potassium grams Sodium sulphite grams Water hardening hydroquinone hypo increased keeping properties lamp light M.Q. developer ment Meritol metabisulphite method metol minutes monobath obtained ounce 25 ounces 100 c.cm ounces 50 grams paper pH value Phenidone photographic plate or film Potassium bromide Potassium carbonate printing processing solution Pyrocatechin quantity quart rapid reduced replenisher result rinse roll films rollers safelight salt sensitive material silver bromide silver halide sodium carbonate Sodium hydroxide Sodium sulphite Sodium sulphite anhyd stock solution suitable surface tank development temperature thiocyanate thiosulphate usually wash