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

ISO-10349-7 - 1ST EDITION - CURRENT


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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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Document Number

ISO 10349-7:1992

Revision Level

1ST EDITION

Status

Current

Publication Date

Dec. 15, 1992

Committee Number

ISO TC 42/WG 6