Colouring masonry surfaces
AssigneeNawkaw Holdings B.V.
InventorAnthony John Watling
Life of this patent
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Abstract
A method of coating a masonry product or structure, in which a single coating of a tinting composition is made on the exposed surface of the masonry product or structure that maintains its look, feel or texture, the masonry product or structure being chosen for suitability by passing one or both of the following tests: A) Wet Area Method: 2 milliliters of water discharged onto the masonry surface within one second at 20-25° C. Will wet out approximately 6 to 34 square centimeters (1 to 5 square inches) of the masonry surface in one minute, or B) Total Absorption Method: 2 milliliters of water discharged onto the masonry surface within one second at 20-25° C. is completely absorbed into the masonry surface within the period of 10 to 60 seconds. The preferred tinting compositions are aqueous latex emulsions.
Claims14
A method of tinting a masonry surface, comprising:
- applying a slurry to a masonry surface comprising a clay brick to form a slurry-coated clay brick, wherein said slurry comprising an aqueous suspension of water, clay, sand, flux, and no added colorants or oxides;
- firing said slurry-coated clay brick, thereby bonding said slurry to said clay brick to form a masonry product, wherein a flux level is selected to prevent the slurry from glassing when the slurry-coated clay brick is fired;
- and
- applying a tinting composition to said masonry product, such that said tinting composition colours said masonry product.
A method of tinting a masonry surface, comprising:
- applying a slurry to a masonry surface comprising a clay brick to form a slurry-coated clay brick, wherein said slurry comprising an aqueous suspension of water, clay, flux, and no added colorants or oxides;
- spraying sand into the slurry as the slurry de-waters on the clay brick;
- firing said slurry-coated clay brick, thereby bonding said slurry to said clay brick to form a masonry product;
- and
- applying a tinting composition to said masonry product, such that said tinting composition colours said masonry product.
A method of producing a reactive surface on a clay brick, comprising:
- applying a slurry to a masonry surface comprising a clay brick to form a slurry-coated clay brick, wherein said slurry comprising an aqueous suspension of water, clay, sand, flux, and no added colorants or oxides;
- and
- firing said slurry-coated clay brick, thereby bonding said slurry to said clay brick, wherein a flux level is selected to prevent the slurry from glassing when the slurry-coated clay brick is fired.
Dependencies are inferred from the claim text.