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Photography - Processing chemicals - Specifications for potassium ferricyanide. Original standard ISO 3624-1994 in PDF full version. Additional info + preview on request

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Photography - Processing chemicals - Specifications for potassium hydroxide. Original standard ISO 3625-1994 in PDF full version. Additional info + preview on request

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Photography - Processing chemicals - Specifications for potassium thiocyanate. Original standard ISO 3626-1996 in PDF full version. Additional info + preview on request

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Photography - Processing chemicals - Specifications for anhydrous sodium metabisulfite. Original standard ISO 3627-2001 in PDF full version. Additional info + preview on request

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Photography - Processing chemicals - Specifications for boric acid, granular. Original standard ISO 3628-1994 in PDF full version. Additional info + preview on request

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Photography - Processing chemicals - Specifications for potassium metabisulfite. Original standard ISO 3629-2000 in PDF full version. Additional info + preview on request

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