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ISO 10349-7:1992 PDF
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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.
| Edition | 1992 |
|---|---|
| Standard Part No | 7 |
| Published Date | 1992 |
| Published By | International Standardization Organisation |
| Page Count | 2 |
