6 сентября, 2015 
Pokraskin Measured values of the heat stability of pigments depend on the type and duration of the heat applied, and also on the binder used. Low thermal stability in white coatings leads to yellowing, even when the unpigmented binder is resistant to yellowing. With colored coatings, changes in the hue of the pigmented binder can be measured colorimetrically (see Section 1.3.2). Standards only exist for special systems (e. g., hard and soft PVC; and cement, see Section 1.5.2.3). Thermal resistances of pigments are customarily quoted at two temperatures: 1. the maximum temperature at which the hue remains stable, and 2. the temperature at which a defined hue change is observed. For standards, see Table 1.1 (“Heat stability” and “Coloration of building materials”).
1.4.2.4
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