Patent ID: 7829516

Claim:
A warewashing detergent composition comprising: (a) a cleaning agent comprising a detersive amount of a surfactant; (b) an alkaline source comprised of at least 17 weight percent carbonate or bicarbonate or hydroxide in an amount effective to provide a use composition having a pH of at least about 8 and obtained by diluting the warewashing detergent composition with water; and (c) a corrosion inhibitor in an amount sufficient for reducing corrosion of glass, the corrosion inhibitor comprising: (i) a source of aluminum ion; (ii) a source of zinc ion; and (iii) wherein the source of aluminum ion and the source of zinc ion are present in amounts sufficient to provide a use composition having a weight ratio of zinc ion to aluminum ion of at least about 2:1 up to about 15:1; (d) encapsulated chlorine bleaching agent; and (e) less than 10 weight percent water wherein the detergent is formed into a block.