NOVEL BLACK GLASS BEAD PRODUCTS
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Abstract
NOVEL, ESSENTIALLY NONDEVITRIFIED, BLACK GLASS ELEMENTS OF HIGH REFRACTIVE INDEX WHICH ARE HIGHLY TRANSMISSIVE TO INFRARED LIGHT AND HIGHLY ABSORPTIVE OF VISIBLE LIGHT, SAID GLASS CONSISTING ESSENTIALLY OF A BASE GLASS COMPONENT HAVING INGREDIENTS CAPABLE OF FORMING A GLASS WITH AN INDEX OF REFRACTION OF AT LEAST 1.6 AND DISSOLVED LIGHT FILTERING COMPONENTS CONSISTING ESSENTIALLY OF 0.1-3 WEIGHT PERCENT CR2O3, 1-15 WEIGHT PERCENT MNO2, 0.1-10 WEIGHT PERCENT COO, 0-8.7 WEIGHT PERCENT V2O5, 0-10 WEIGHT PERCENT FEO, 0-5 WEIGHT PERCENT NIO, 0-5 WEIGHT PERCENT CUO, 0-15 WEIGHT PERCENT CEO2.
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