Coatings for gemstones and other decorative objects
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United States of America Patent
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Nov 21, 2006
Issued Date -
N/A
app pub date -
Nov 16, 2005
filing date -
Nov 4, 2002
priority date (Note) -
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Abstract
The invention provides a decorative object comprising a transparent or translucent substrate having a body and at least one surface bearing a thin film coating. The coating imparts in the substrate a body color that appears substantially constant at different angles of observation. This body color is imparted in the substrate at least in part by absorption of visible radiation that is transmitted through said coating. The coating includes a high absorption layer comprising film that is highly absorptive of visible radiation. Also provided are methods of coating gems and other decorative objects, as well as methods of heat treating coated gems and other decorative objects.
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