H490DescriptionH490 is H550 with 3.5% added yellow iron oxide. The red color only lasts until cone 8. Firing![]() H490 fired test bars. Top is cone 10R. Below that going downward: cone 10, 9, 8 oxidation. Thus, the oxidation red color only holds under cone 8. For reduction, the both fires almost black. By cone 10R, it is behind to blister and melt. GallerySafety Data SheetClick here for web view. |
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Plainsman Clays Ltd. 702 Wood Street, Medicine Hat, Alberta T1A 1E9 Phone: 403-527-8535 FAX:403-527-7508 Email: tim.lerner@plainsmanclays.com |