초록 ▼

A method of and apparatus for detecting fuel leaks employing color variable indicators. The method comprises the steps of preparing and applying a water soluble non-staining indicator dye to a test surface, observing color changes indicative of hydrocarbon leaks and removing the indicator dye from t

A method of and apparatus for detecting fuel leaks employing color variable indicators. The method comprises the steps of preparing and applying a water soluble non-staining indicator dye to a test surface, observing color changes indicative of hydrocarbon leaks and removing the indicator dye from the test surface. The apparatus comprises in combination means for preparing the indicator dye, means for applying the indicator dye to the test surface and means for removing the dye from the test surface. The indicator dye comprises a major portion of a dry inert mineral carrier from about 0.1 to about 5.0 weight percent of a direct dye which is non-staining on painted surfaces and which does not migrate into or penetrate polyurethane or epoxy resin base painted surfaces, and from 0.1 to about 1.0 weight percent of a surfactant.

대표청구항 ▼

A method for detecting leaks in a fuel tank having a painted surface comprising: a. applying a substance to the painted surface, said substance being suitable for detecting hydrocarbon fluid leaks by color change consisting essentially of from about 0.1 to about 5.0 percent by weight of a dye solubl

A method for detecting leaks in a fuel tank having a painted surface comprising: a. applying a substance to the painted surface, said substance being suitable for detecting hydrocarbon fluid leaks by color change consisting essentially of from about 0.1 to about 5.0 percent by weight of a dye soluble in bath water and low chain alcohols whereby said dye is essentially non-staining on said painted surface and which does not migrate into or penetrate said painted surface said painted surface containing a polyurethane or epoxy resin base; from about 0.1 to about 1.0 percent of a surfactant; and a dry inert mineral carrier comprising a substantial balance of the substance; b. observing any changes in the color of the substance; and c. removing the substance from the painted surface being tested.