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standard by International Organization for Standardization, 10/01/2000
This part of ISO 787 specifies a general method of test for determining the percentage by mass of matter soluble in boiling water, in a sample of pigment or extender.
ISO 787-8 specifies a method for determining the percentage by mass of matter soluble in water by cold extraction. For most pigments and extenders, these two test methods will give different results, and it is therefore essential to state clearly in a specification which method is to be used, and in the test report which method has been used.