Patent ID: RE41938

Claim:
A stain masking and removing kit consisting essentially of: a) a liquid composition comprising: i. titanium dioxide as a photocatalyst, having a concentration in the range of from 0.1 to 40 weight percent of the composition; ii. oxalic acid as a co-reagent in a concentration between 1 and 20 weight percent of the composition; iii. platinum as a dopant in a concentration range between 0.0001 and 5 weight percent of the composition; and iv. a liquid solvent in a concentration range of from 40 to 99.9 weight percent of the composition, wherein a user unites a portion of the photocatalyst with a portion of the co-reagent, a portion of the dopant, and a portion of the liquid solvent to mask the color of a stain of a different color than the background surface; and b) an applicator selected from the group consisting of a brush, sponge, cloth, sprinkler, sprayer, pressurized spray can, or dropper for applying the liquid composition to a stain on a rugged, solid surface, thereby providing a masking effect of the stain against the background surface.