BS ISO 5990:1996 - Photography. Processing chemicals. Specifications for potassium sulfite, 650 g/l aqueous solution
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BS ISO 5990:1996 is a British Standard that provides specifications for potassium sulfite in the form of a 650 g/l (grams per liter) aqueous solution used in the field of photography. This standard outlines the requirements and characteristics of this particular chemical solution used in the photographic processing industry.
Key aspects that BS ISO 5990:1996 may cover include:
Chemical Composition: Specifications for the chemical composition and purity of the potassium sulfite solution, including allowable impurities or contaminants.
Concentration: The standard likely specifies that the solution should have a concentration of 650 grams of potassium sulfite per liter of the aqueous solution.
Physical Properties: Requirements for the physical properties of the solution, such as color, odor, density, and appearance.
Chemical Properties: Information about the chemical properties of the solution, including its solubility, reactivity, and stability under recommended storage conditions.
Packaging and Labeling: Guidelines for packaging the solution, labeling, and information that should be included on the product label, such as safety instructions and handling precautions.
Handling and Storage: Recommendations for the proper handling and storage conditions of the solution to maintain its quality and safety.
Quality Control: Guidance on quality control procedures to ensure the solution meets the specified requirements and maintains its performance in photographic processing.
Compliance: Instructions on how to verify compliance with the standard's specifications and how to conduct relevant testing or analysis.
Photographic processing chemicals like potassium sulfite are critical for various steps in photographic development, including the reduction of unexposed silver halide and the preservation of developed images. Standards like BS ISO 5990 help ensure that these chemicals are of consistent quality and meet the necessary requirements for their intended use in the photography industry.
