Active Standard ASTM D768 | Developed by Subcommittee: D01.31
Book of Standards Volume: 06.03
Historical (view previous versions of standard)
This specification covers the pigment commercially known as yellow iron oxide, hydrated. The pigment shall be a manufactured yellow iron oxide obtained by chemical reaction and shall be soft, finely powdered, and free of admixtures of other substances. The pigment shall conform to the composition requirements prescribed for: hydrated oxide of iron, total oxide of iron, loss on ignition, moisture and other volatile matter, water soluble matter, and coarse particles (total residues retained), and to the specified hydrogen ion concentration (pH value). The paste in oil shall be made by thoroughly grinding the specified pigment with linseed oil and the paste shall conform to the requirements prescribed for the following: pigment, nonvolatile vehicle, moisture by distillation, coarse particles and skins, and consistency by Stormer viscometer. The mass color character of the tint and the tinting strength formed by a mixture with a white pigment shall be within the specified limits. The methods for sampling, chemical analysis, and tests to determine conformance to the specified properties are given.
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1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D50 Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese
D185 Test Methods for Coarse Particles in Pigments
D280 Test Methods for Hygroscopic Moisture (and Other Matter Volatile Under the Test Conditions) in Pigments
D1208 Test Methods for Common Properties of Certain Pigments
ICS Number Code 87.060.10 (Pigments and extenders)