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US 5,842,815 AGranted
Chemical treatment of treading surfaces
AssigneeArthur Michael Rogers Howes
InventorPhilip Anthony Curtis
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AssigneeArthur Michael Rogers Howes
InventorPhilip Anthony Curtis
Estimating the term…
A chemical solution for neutralizing treading surfaces includes a neutralizing agent such as an alkaline silicate neutralizing solution, a suitable dyestuff (non-indicator dye) and a masking agent (indicator dye) for masking the true color of the dyestuff. The masking agent becomes colorless at a pH of 7.0 or greater. The chemical solution is applied to a suitable treading surface, such as a ceramic tile floor, a suitable time after an acid treatment solution of hydrofluoric acid and nitric acid has been applied to the treading surface. Use of the indicator dye in combination with the non-indicator dye in the chemical solution yields a strongly visible color change which distinguishes the areas that have been sufficiently supplied with neutralizing solution from those that have not been sufficiently supplied with the neutralizing solution.
A method of chemically treating treading surfaces to reduce their slipperiness, which includes the steps of applying a suitable treatment solution of hydrofluoric acid and nitric acid to a treading surface;
A chemical solution for neutralising treading surfaces treated chemically to reduce their slipperiness by hydrofluoric acid and nitric acid, which includes a neutralising agent, a suitable dyestuff and a masking agent for masking the true colour of the dyestuff by an indicator dye, which becomes colourless at a pH of 7.0 or greater.
Dependencies are inferred from the claim text.