ASTM-D79 › Standard Specification for Zinc Oxide Pigments
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This specification establishes the properties and requirements for the pigment commercially known as "zinc white" or zinc oxide, which may be purchased either in the dry or paste in oil forms. Dry pigments, which may be processed either by the French process or American process, shall conform individually to required compositions of zinc oxide, total sulfur, moisture and other volatile matter, total impurities (including moisture and other volatile matter), and coarse particles (total residue retained on a No. 325 sieve). Conversely, pigments in the paste in oil form shall adhere to required composition of the pigment, linseed oil, moisture and other volatile matter, and coarse particles and skins (total residue retained on a No. 325 sieve). Pigments shall also be tested for tinting strength, and oil absorption by Gardner-Coleman and spatula rub-out methods.
Scope
1.1 This specification covers the pigments commercially known as "zinc white" or zinc oxide. The pigments may be purchased in the dry form or as a paste in oil. Note 1Zinc oxides are used in many industries. For additional information, see Classification D 4295 and Test Methods D 4315 for descriptions of zinc oxide use in rubber compounding.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
Keywords
American process; French process; mildew protection; ultraviolet absorption; zinc oxide; zinc white; ICS Number Code 87.060.10 (Pigments and extenders)
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87.060.10 (Pigments and extenders)
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Document Number
ASTM-D0079-86R20
Revision Level
1986 R20 EDITION
Status
Current
Modification Type
Reapproval
Publication Date
June 16, 2020
Document Type
Specification
Page Count
2 pages
Committee Number
D01.31