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Significance and Use
Tinting strength is one of the most important properties of a white pigment. This test method provides a means of testing this property for quality control.
This test method is a referee method, and the vehicle for preparing the dispersion and the black for tinting are suggested, but others may be used provided both the purchaser and the seller agree to the changes.
The results obtained with a muller do not necessarily agree with industrial situations where different dispersing conditions exist. However, dispersing with a muller is a fast, relatively inexpensive way of testing tinting strength for routine quality control.
1.1 This test method describes the procedure for determining the relative tinting strength of white pigments by reflectance measurements of black tints.
1.2 This test method is applicable only for comparing the test pigment with a reference standard of the same type and grade.
Note 1—Test Method D 332
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D332 Test Method for Relative Tinting Strength of White Pigments by Visual Observation
D2244 Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
ICS Number Code 87.060.10 (Pigments and extenders)
UNSPSC Code 31211503(Pigment paints)