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BS EN ISO 787-17:2019
General methods of test for pigments and extenders Comparison of lightening power of white pigments (British Standard)
This document specifies a general method of test for comparing the lightening (reducing) power of a white pigment with the lightening power of an agreed sample of the same type.
Two procedures (A and B) are specified. Procedure A is quicker than procedure B and is suitable for testing one sample of pigment; procedure B is better for testing several samples, and especially if a pigment of unknown lightening power is being tested.
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British Standards Institution [bsi]
