Patent ID: 6500249
Filing Date: 2002-12-31
Classification: C04B

Abstract:
An acid-based, earth-tone stain for coloring rocks, stones, and cementitious materials, said system comprising:(a) a blend formed by mixing together two or more of a plurality of saturated, hydrochloric acid base solutions in a desired proportion, each base solution comprising a pH of approximately 1 or less, and each base solution comprising dissolved, heavy metals for inducing a particular dark earth tone color when the stain is thereafter applied to said rocks, stones, or cementitious materials; (b) wherein a first base solution comprises a dissolved heavy metal salt selected from the group comprising black iron oxide, manganese oxide, sodium dichromate, and Arkansas black shale ore; (c) wherein a second base solution comprises a dissolved heavy metal salt selected from the group comprising commercial red iron oxide, black iron oxide, yellow iron oxide, manganese oxide, manganese chloride, vanadium trioxide, cupric chloride, ferric chloride solution, and iron ore; (d) wherein a third base solution comprises a dissolved heavy metal salt selected from the group comprising red iron oxide, manganese chloride, and cupric chloride; (e) wherein a fourth base solution comprises a dissolved heavy metal salt selected from the group comprising yellow iron oxide, sulfuric acid, sodium dichromate, barium sulfate, phosphoric acid and vanadium trioxide; and, (f) wherein the resulting color caused by application of the stain is varied between a darkest and lightest form by diluting the blend with water at the job site at a ratio of at least 1:1 and up to a ratio of 1:60 by volume.