Process for coloring granite

Details Process for coloring granite Process for coloring granite

1986-06-17

1987-09-22

Lusignan,, Michael

Coating processes

Vacuum utilized prior to or during coating

427299, 4273741, 427387, 4273936, 428540, B05D 302, C14L 900

Patent

active

046954872

ABSTRACT:
A process for coloring granite a which comprises dissolving in a solvent a metallic salt formed by reacting a metal with a strong acid to form a solution, introducing the solution to a vacuum container charged with granite to permeate the solution into the granite, developing color by heating the permeated granite in a heating furnace maintained at temperatures in the range from 250.degree. C. to 300.degree. C. for 2 to 3 hours, cooling down to room temperature, and finally surface-treating the colored granite with silicone oil.

REFERENCES:
patent: 3704159 (1972-11-01), Sayre
patent: 4273813 (1980-06-01), Meddaugh
patent: 4520051 (1985-05-01), Harrison
patent: 4620989 (1986-11-01), Stiegler

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