COMPOSITION AND METHOD

摘要

A cleaning composition comprising from 30 to 70 percent by weight of 1-alkyl-2-pyrrolidone, from 25 to 45 percent by weight of hydrocarbon and from 5 to 25 percent by weight of water exhibits good cleaning performance and a visual indication of activity. The composition is on or adjacent to a phase boundary of its phase diagram and exhibits self-induced surface motility of the Marangoni type.