These test methods compile in one place, recommended procedures for analyzing inorganic colored pigments. These pigments are used extensively in paints, and for this reason their compositions are important to the formulators and user.
1.1 These test methods cover procedures for the chemical analysis of yellow, orange, red, and brown pigments containing iron and manganese. The test methods apply specifically to the following pigments: synthetic hydrated yellow iron oxide, yellow ocher, red and brown iron oxides, raw and burnt umber, raw and burnt sienna, and venetian red.
1.2 The analytical procedures appear in the following order:
| ASTM | ||
| Method | ||
| Refer- | ||
| Dry Pigments | Sections | ences |
| Moisture and Other Volatile Matter | D 280 | |
| Loss on Ignition | ||
| Coarse Particles | D 185 | |
| Matter Soluble in Water | D 1208 | |
| Organic Coloring Matter | ||
| Iron Oxide | and | |
| Calcium Compounds (Reported as CaO) | and | |
| Sulfates Soluble in Hydrochloric Acid | and | |
| Lead Chromate (in Ochers) | ||
| Calcium Carbonate (in Venetian Red) | C 25 | |
| Manganese (in Siennas and Umbers) | and | |
| Pigment Pastes in Oil | ||
| Pigment Content | D 1208 | |
| Moisture and Other Volatile Matter | D 1208 | |
| Nonvolatile Matter in Vehicle | ||
| Moisture by Distillation | D 1208 | |
| Coarse Particles and Skins | D 185 | |
| Consistency (Stormer) | D 562 |
1.3 solely-SI-units;
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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