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Paint and Coatings Industry Standards
ISO 787-15:1986 ISO 787-15:1986 General methods of test for pigments and extenders -- Part 15: Comparison of resistance to light of coloured pigments of similar types
Describes two methods of exposure. In method A, the material is exposed under glass to natural light. In method B, the material is exposed to direct artificial light. The test sample and the agreed reference pigment are each dispersed in the same agreed binder. The dispersions are applied to a substrate and dried; they are then exposed to natural daylight with protection from rain (method A) or to artificial light (method B) under specified conditions.
