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ASTM D3721-05

Current Revision

Standard Specification for Synthetic Red Iron Oxide Pigment

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1.1 This specification covers synthetic red iron oxide for use in paints and coatings manufactured by any of the following:

1.1.1 Calcination of iron salts.

1.1.2 Precipitation from iron salts.

1.1.3 Calcination of synthetic iron oxide.

1.1.4 Product of organic reduction.


This specification covers synthetic red iron oxide pigment for use in paints and coatings manufactured by any of the following: calcination of iron salts, precipitation from iron salts, calcination of synthetic iron oxide, and product of organic reduction. The pigment shall conform to the requirements prescribed for the following: total iron oxide content, sulfur content, moisture and other volatile matter content, organic coloring matter content, coarse particles in dry pigments (total residue retained), matter soluble in water, and pH value. If the pigments are available in a range of colors, the mass color and the tinting strength or character of the tint formed by mixture with a white pigment shall be within the specified limits. The sampling and test methods to determine conformance of the pigments to the specified properties are given.


SDO ASTM: ASTM International
Document Number D3721
Publication Date Sept. 1, 2005
Language en - English
Page Count 2
Revision Level 05
Supercedes
Committee D01.31
Publish Date Document Id Type View
Sept. 1, 2005 D3721-05 Revision
May 1, 2019 D3721-05R19 Reaffirmation
June 1, 2011 D3721-05R11 Reaffirmation
May 10, 1999 D3721-83R99 Reaffirmation