Detergent comprising a surfactant, an alkali and an indicator to show when the surface is cleaned and cleaning method therefor

摘要

This detergent is for use in a cleaning method comprising adhering bubbles of a detergent liquid to the surface of an object to be cleaned, (e.g., a tire wheel), and removing the adherent dirt from the object surface with the detergent bubbles. The detergent is characterized by comprising a) a surfactant, b) at least one alkali compound selected from the group consisting of ammonia and aminated alkali compounds, and c) at least one indicator which changes its color upon a change from alkalinity to neutrality, the alkali compound being contained in such an amount that the alkali compound disappears through reaction with carbon dioxide in the same period as that required for removing almost all the dirt from the surface of the object.