Grey glass composition and method of making same
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United States of America Patent
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Jun 11, 2002
Issued Date -
N/A
app pub date -
Feb 23, 2001
filing date -
Mar 29, 1999
priority date (Note) -
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Abstract
A high LTa, low UV and IR transmittance grey glass employing as its colorant portion iron (Fe.sub.2 O.sub.3 /FeO), erbium (Er.sub.2 O.sub.3) and, optionally, titanium (TiO.sub.2). Enhanced effects are achieved by forming separate prebatch mixes, one of which includes rouge, metallic Si (optional), SiO and sand, the other including the remainder of ingredients, which after separate formation are then admixed to form the final, overall batch.
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