1 Scope
This International Standard establishes criteria for the purity of photographic-grade potassium metabisulfite and specifies the tests to be used to determine the purity.
BS ISO 3629:2000 history
2002BS ISO 3629:2002 Photography - Processing chemicals - Specifications for potassium metabisulfite
2002BS ISO 3629:2000 Photography. Processing chemicals. Specifications for potassium metabisulfite