name the substance used in making photographic plates
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Photographic film is a strip or sheet of transparent plastic film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. ...The emulsion will gradually darken if left exposed to light, but the process is too slow and incomplete to be of any practical use.
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Cellulose,polyethylene. ...it will be more in detail in polymers chapter..✌
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