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ISO 10349-7:1992

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

Publication date:   Dec 30, 1992

General information

90.93 Standard confirmed   Jun 5, 2023

ISO

ISO/TC 42 Photography

International Standard

37.040.30   Photographic chemicals

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Scope

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.

Life cycle

NOW

PUBLISHED
ISO 10349-7:1992
90.93 Standard confirmed
Jun 5, 2023