Composition for colouring glass and uses thereof
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United States of America Patent
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Jan 13, 2015
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Feb 21, 2013
filing date -
Feb 21, 2012
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Abstract
The present invention relates to a coloring composition free of nickel oxide. In particular, the coloring composition for glass comprises manganese dioxide (MnO2), chromium oxide (III) (Cr2O3), cobalt oxide (Co3O4) and a glass medium. Furthermore, the present invention relates to the process for producing the coloring composition and the use thereof for the purpose of imparting a dark color (black), in particular a blue-violet-black color, to the glass.
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