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ASTM D3721-83(1999)
- Standard Specification for Synthetic Red Iron Oxide Pigment
- standard by ASTM International, 05/10/1999
- Publisher: ASTM
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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.