Patent ID: 6299701
Filing Date: 2001-10-09
Classification: C11D

Abstract:
A method for washing glass, crystal or porcelain articles, and eliminating or limiting the corrosion of glass, crystal or porcelain articles and patterns on glass, crystal or porcelain by repeated washing in a dishwasher, said method comprising using a detergent composition comprising at least one soluble alkali metal silicate with an average SiO.sub.2 /M.sub.2 O molar ratio from about 1 to about 4.2, wherein M represents an alkali metal, and generating a washing medium having a pH greater than 9.8 at a working concentration of 3 g/l to about 12 g/l and a concentration of protonated silicic monomer Si(OH).sub.4 of at least 2.5.times.10.sup.-3 mol/liter of washing medium.