Лако-красочные материалы — производство

The depth of shade is a measure of the intensity of a color sensation. It increases with increasing chroma and generally decreases with increasing lightness. The col­orfastness of colorations (e. g., textile dyeing) is dependent on depth of shade; the fastness properties of pigments or pigmented systems must therefore be tested at a predetermined depth of shade. This standard method therefore ensures that sam­ples with standard depths of shade are used to determine the fastness properties of pigments or pigmented systems [1.74, 1.75]. For standards, see Table 1.1 (“Standard depth of shade”). Apparatus: spectrophotometer with gloss trap. (For light stability in cement, see Section 1.5.2.3).

1.4.2.2