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.
EN ISO 787-17-2019由CEN - European Committee for Standardization 发布于 2019-05-01,并于 2019-05-24 实施。
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