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This specification covers two types of pigment commercially known as basic lead silicochromate. Both types of pigment shall consist of silica coated with lead licates and lead chromates with mass color and character, and oil absorption equal to that of a reference sample as agreed upon by the purchaser and seller. Specimens shall be sampled, prepared, and undergo chemical analysis to test their conformance with specified compositions of lead oxide, chromium trioxide, silica, and moisture and other volatile matter. Materials shall also be tested for ignition loss, specific surface diameter, and particle loss by microscopic methods.
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 two types of pigment commercially known as basic lead silicochromate.
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 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D1208 Test Methods for Common Properties of Certain Pigments
D1366 Practice for Reporting Particle Size Characteristics of Pigments
D1844 Test Methods for Chemical Analysis of Basic Lead Silicochromate
E20 Practice for Particle Size Analysis of Particulate Substances in the Range of 0.2 to 75 Micrometres by Optical Microscopy
ICS Number Code 87.060.10 (Pigments and extenders)
UNSPSC Code 31211503(Pigment paints)
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ASTM D1648-86(2020), Standard Specification for Basic Lead Silicochromate Pigment, ASTM International, West Conshohocken, PA, 2020, www.astm.orgBack to Top