This specification details the properties and requirements for the pigment commercially known as black synthetic iron oxide, which is manufactured ferrous-ferric oxide obtained by chemical reaction. It shall be a soft dry finely powdered pigment, free of admixtures of other substances. Specimens shall be sampled, chemically tested, and conform accordingly to specified values of the following requirements: total iron oxides (as ferrous and ferric oxide); ferrous iron in iron oxide; water-soluble matter; moisture and other volatile matter; coarse particles (total residue retained on a No. 325 sieve); hydrogen ion concentration (pH value); and mass color, tint character, and tinting strength.
| SDO | ASTM: ASTM International |
| Document Number | D769 |
| Publication Date | Nov. 1, 2012 |
| Language | en - English |
| Page Count | 2 |
| Revision Level | 01(2012) |
| Supercedes | |
| Committee | D01.31 |