Process for coloring granite
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United States of America Patent
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-
Sep 22, 1987
Grant Date -
N/A
app pub date -
Jun 17, 1986
filing date -
Apr 14, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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