Photography. Processing chemicals. Specifications for potassium sulfite, 650 g/l solution Ingestion-build-63114 counterbores and internal threads

counterbores and internal threads

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Photography. Processing chemicals. Specifications for potassium sulfite, 650 g/l solution Ingestion-build-63114 counterbores and internal threads1 Scope This International Standard establishes criteria for the purity of photographic grade potassium sulfite, 650 g I aqueous solution, and specifies the tests to be used to determine the purity.