
Photography — Photographic-grade chemicals — Test methods — Part 7: Determination of alkalinity or acidity
NORM herausgegeben am 30.12.1992
Bezeichnung normen: ISO 10349-7:1992
Ausgabedatum normen: 30.12.1992
Zahl der Seiten: 2
Gewicht ca.: 6 g (0.01 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: 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.