Method of improving the color of transparent materials

Details Method of improving the color of transparent materials Method of improving the color of transparent materials

1996-08-29

1998-12-29

Epstein, Henry F.

Stock material or miscellaneous articles

Three dimension imitation or 'treated' natural product

63 32, 427162, 427453, A44C 1700

Patent

active

058538267

ABSTRACT:
A faceted gemstone having at least one thin layer of material coated on the pavilion of a transparent substrate so that the body of the gemstone appears to have a different color. The color of reflected light changes hues when viewed through the face of the gemstone at different angles of observation. This causes the gemstone to appear to change color when the stone is tilted. The thin film is coated by low temperature techniques such as sputtering.

REFERENCES:
patent: 2690630 (1954-10-01), Eversole et al.
patent: 3039280 (1962-06-01), Flad et al.
patent: 3490250 (1970-01-01), Jones
patent: 4039726 (1977-08-01), Carr et al.
patent: 4809417 (1989-03-01), Normann, Jr.

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