Burgundy colored glassware
AssigneeCorning Incorporated
InventorsW. Duane Amundson, Jr., Robert M. Morena
Life of this patent
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Abstract
A transparent glass exhibiting a burgundy color, and glassware molded therefrom, the glass consisting essentially of 0.3 to 2.2% by weight of manganese oxide, calculated as MnO.sub.2, in a soda lime silicate base glass, exhibiting chromaticity coordinates (Illuminant C) falling within the ranges x=0.3200 to 0.3700 y=0.3300 to 0.3080 Cap Y=25 to 72 and having impurity levels for NiO and Fe.sub.2 O.sub.3 not exceeding 100 ppm and 500 ppm, respectively.
Claims17
A transparent glass exhibiting a burgundy color, the glass consisting essentially of 0.3 to 2.2% by weight of manganese oxide, calculated as MnO.sub.2, in a soda lime silicate base glass, exhibiting chromaticity coordinates (Illuminant C) falling within the ranges
- x=0.3200 to 0.3700
- y=0.3300 to 0.3080
- Cap Y=25 to 72
- and having impurity levels for NiO and Fe.sub.2 O.sub.3 not exceeding 100 ppm and 500 ppm, respectively.
Tempered, transparent glassware molded from a soda lime silicate base glass containing 0.3 to 2.2% by weight manganese oxide, calculated as MnO.sub.2, exhibiting chromaticity coordinates (Illuminant C) falling within the ranges
- x=0.3200 to 0.3700
- y=0.3300 to 0.3080
- Cap Y=25 to 72
- and having impurity levels for NiO and Fe.sub.2 O.sub.3 not exceeding 100 ppm and 500 ppm, respectively, whereby the glassware has a burgundy color.
A tempered, transparent cover for a glass-ceramic cooking vessel, the cover being molded from a soda lime silicate base glass containing 1.0 to 1.6% by weight manganese oxide calculated as MnO.sub.2, up to 0.1% Sb.sub.2 O.sub.3 as a fining agent and having impurity levels for NiO and Fe.sub.2 O.sub.3 not exceeding 100 ppm and 500 ppm, respectively, the glass exhibiting x and y chromaticity coordinates within the ranges
- x=0.3225 to 0.3400
- y=0.3295 to 0.3118
- whereby the color of the cover is coordinated with the color of the cooking vessel.
Dependencies are inferred from the claim text.