ISO 10349-7:1992 Preview

Photography -- Photographic-grade chemicals -- Test methods -- Part 7: Determination of alkalinity or acidity

The method is based on weighing the test portion, dissolution in carbon-dioxide-free water, adding phenolphthalein indicator, and observing the colour of the test solution: if the test solution turns pink, determination of the alkalinity, if it remains colourless, determination of the acidity.


General information

  • Current status : Published
    Publication date : 1992-12
  • Edition : 1
    Number of pages : 2
  • :
    ISO/TC 42
    Photography
  • 37.040.30
    Photographic chemicals

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