Cleaning compositions

摘要

A dual container delivery system comprises a first containing a first aqueous solution comprising a hypochlorite bleach or a source thereof and having a pH above 13. A second container contains an aqueous solution comprising an acid. Delivery means delivers the first and second solutions to a surface such that they mix just before or upon impacting the surface. The amount and strength of the acid in the second solution is such that the pH of the resulting mixture is from 8 to 13, preferably from 9 to 12.