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Significance and Use
This test method is used as a referee method and for quality control. The vehicle (oil) for preparing the dispersions and the tinting pigment (ultramarine blue) are specified but other vehicles and tinting pigments can be used. Any such changes in the test method must be agreed upon between the purchaser and the seller.
The results obtained with a muller do not necessarily agree with an industrial situation where different dispersing conditions exist. However, dispersing with a muller is a fast and 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 visual assessment of blue 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 D2745 describes a procedure for instrumental evaluation of black tinted samples.
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.
D262 Specification for Ultramarine Blue Pigment
D2745 Test Method for Relative Tinting Strength of White Pigments by Reflectance Measurements
ICS Number Code 87.060.10 (Pigments and extenders)
UNSPSC Code 31211503(Pigment paints)
ASTM D332-87(2011), Standard Test Method for Relative Tinting Strength of White Pigments by Visual Observation, ASTM International, West Conshohocken, PA, 2011, www.astm.orgBack to Top