Strontium iron manganese black pigment
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United States of America Patent
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Jul 6, 2004
Grant Date -
N/A
app pub date -
Apr 17, 2003
filing date -
Apr 17, 2003
priority date (Note) -
Expired
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Abstract
A black pigment substantially free of objectionable transition metal materials is disclosed. This pigment is particularly useful for coloring glass since the absence of the transition metal gives it excellent recycling properties. The pigment is an alkaline earth (preferably strontium) iron maganese oxide material as specifically defined the in the present invention.
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