Method of etching stone materials

Details Method of etching stone materials Method of etching stone materials

1994-02-03

1995-02-28

Powell, William

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156654, 252 792, 252 793, 252 795, B44C 122

Patent

active

053933770

ABSTRACT:
The present invention relates to an improved method of engraving stone which comprises the steps of; applying to a stone material an acid resistant polymer or lacquer coating upon portions of said stone material that are not to be engraved; bathing the coated stone material with a sufficient amount of acid for a sufficient period of time to engrave said stone material; washing the stone material with a sufficient amount of base to neutralize the acid; and, removing the coating to obtain an engraved stone material.
In particular the present invention relates to methods of engraving marble or onyx using nitric acid, hydrochloric acid or hydrofluoric acids.

REFERENCES:
patent: 437306 (1890-09-01), Kraupa et al.
patent: 5273620 (1993-12-01), Lamberti

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