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Main page>ISO Standards>ISO 10349-7:1992 - Photography — Photographic-grade chemicals — Test methods — Part 7: Determination of alkalinity or acidity
immediate downloadReleased: 1992-12-30
ISO 10349-7:1992 - Photography — Photographic-grade chemicals — Test methods — Part 7: Determination of alkalinity or acidity

ISO 10349-7:1992

ISO 10349-7:1992 - Photography — Photographic-grade chemicals — Test methods — Part 7: Determination of alkalinity or acidity

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Standard´s number:ISO 10349-7:1992
Edition:1
Released:1992-12-30
Pages (English):2
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ISO 10349-7:1992

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.

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