ISO 10349-7:1992

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

Publication date: Dec 30, 1992

General information

Current stage: 90.20 Effective date: Jan 15, 2023

Originator: ISO

Owner: ISO/TC 42

Type: International Standard

ICS: 37.040.30

Languages: English

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Status: Published

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Paper - EC$120.40

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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
90.20 Standard under periodical review
Jan 15, 2023

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