This specification establishes the properties and requirements for pigments that consist substantially of natural hydrous magnesium silicate (talc), and can be suitably processed to what is commercially known as paint pigment quality. Specimens shall be suitably sampled and tested, and should conform to specified requirements as to combined magnesium and calcium silicates content, calcium oxide content, aluminum and iron oxides content, loss on ignition, moisture and other volatile material, color, coarse particles, water-soluble matter, oil absorption, consistency, and fineness.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
1.1 This specification covers pigments that consist substantially of natural hydrous magnesium silicate, and is restricted to those minerals that conform to the chemical limits prescribed herein and can be suitably processed to what is commercially known as paint pigment quality.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following hazard caveat applies to the test method portion of this specification only. 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.
D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
D281 Test Method for Oil Absorption of Pigments by Spatula Rub-out
D562 Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer
D717 Test Methods for Analysis of Magnesium Silicate Pigment
D1208 Test Methods for Common Properties of Certain Pigments
D1210 Test Method for Fineness of Dispersion of Pigment-Vehicle Systems by Hegman-Type Gage
hydrous magnesium silicate; magnesium silicate; pigment; talc;
ICS Number Code 87.060.10 (Pigments and extenders)
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Citing ASTM Standards
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