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Description of ASTM-D6131 2012ASTM D6131 - 97(2012)Standard Test Method for Evaluating the Relative Tint Undertone of Titanium Dioxide PigmentsActive Standard ASTM D6131 | Developed by Subcommittee: D01.26 Book of Standards Volume: 06.01 ASTM D6131Significance and Use 5.1 This test method allows the user to make a quick determination of the blueness or yellowness of the tint undertone of titanium dioxide pigments, versus a reference pigment agreed upon by the parties to the test. This is an important measure of tone, since it gives both a measure of effective particle size, and quick approximation of the blue/yellow undertone that can be expected when a coating containing the titanium dioxide is tinted. 5.2 Such matters as the vehicle for preparing the dispersions, and the black for tinting have been suggested. However, changes in the components may be made by agreement between the buyer and the seller. 5.3 The results obtained with a mechanical muller do not necessarily correlate directly with a practice where different dispersion conditions exist. However, dispersion with a mechanical muller is a quick and inexpensive way of evaluating the undertone of a titanium dioxide pigment. 1. Scope 1.1 This test method is intended to be used to determine the tint undertone (blue or yellow) of titanium dioxide pigments. This relates to the effective particle size of the pigment. It is based upon tinting with a black iron oxide, but other blacks may be used if found suitable. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 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.
ASTM Standards D16 Terminology for Paint, Related Coatings, Materials, and Applications D2745 Test Method for Relative Tinting Strength of White Pigments by Reflectance Measurements E313 Practice for Calculating Yellowness and Whiteness Indices from Instrumentally Measured Color Coordinates E1331 Test Method for Reflectance Factor and Color by Spectrophotometry Using Hemispherical Geometry E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry E1349 Test Method for Reflectance Factor and Color by Spectrophotometry Using Bidirectional (45:0 or 0:45) Geometry Keywords mechanical muller; tint undertone; titanium dioxide pigment; ICS Code ICS Number Code 87.060.10 (Pigments and extenders) DOI: 10.1520/D6131-97R12 ASTM International is a member of CrossRef. ASTM D6131This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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