SSH EN ISO 787-15:1995

Metodat e përgjithshme të provës për pigmentet dhe shpërndarësit - Pjesa 15:Krahasimi i qëndrueshmërisë karshi dritës për pigmentet ngjyrues të tipit të njëjtë (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 (ISO 787-15:1986)

Scope

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. The resistance to light is assessed by comparing the change in colour of the test sample to that of the agreed reference pigment. Cancels and replaces the first edition ISO 787/15-1973.