Method for treating a gem and gem treated with this method

Details Method for treating a gem and gem treated with this method Method for treating a gem and gem treated with this method

1982-05-06

1984-01-17

Weisstuch, Aaron

Jewelry

Gem

40629, 204192E, 156643, 427 7, 428916, C23C 1500, A44C 1700

Patent

active

044257694

ABSTRACT:
A method for treating a gem stone to cause a marking thereon, wherein a photoresist resin is secured to the stone, a photographic film bearing the desired marking is applied over said resin, said resin is developed by exposing same to a light source, the exposed portions of said resin, as well as said film, are removed, and the thus-treated portion of the stone is subjected to a cathode bombardment in such a way that etching of the stone occurs in those locations which are not protected by said resin.

REFERENCES:
patent: 3945902 (1976-03-01), Hawrylo et al.
patent: 4056952 (1977-11-01), Okuda
patent: 4219199 (1980-08-01), Okuda

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