Method of mechanical dishwashing and compositions

In the process of mechanically washing of soiled dishes by mechanically contacting soiled dishes with an alkaline aqueous solution at a pH of from 8 to 13 containing a sufficient amount of a water softening agent whereby the soil on said soiled dishes is dispersed or dissolved, rinsing said dishes with a clear rinse liquid and recovering said dishes substantially soil-free, the improvement which consists of using a composition for use in mechanical dishwashers consisting essentially of (A) 44 percent by weight on the anhydrous basis of a finely-dispersed water-insoluble aluminosilicate compound having primary particles in the size range of 100 .mu. to 0.1 .mu., a calcium binding power of 150 mg CaO/gm of anhydrous substance when measured at 22.degree. C by the Calcium Binding Power Test Method described in the specification and the formula

• 0.9 Na.sub.2 O .multidot. Al.sub.2 O.sub.3 .multidot. 2.05 SiO.sub.2 .multidot. 4.3 H.sub.2 O
• (b) 40 percent by weight of Na.sub.2 SiO.sub.3, (C) 2 percent by weight of the sodium or potassium salt of dichloroisocyanuric acid, (D) 1 percent by weight of a nonionic block polymer of ethylene oxide to polyoxypropylene glycol with a molecular weight of 1900 where the amount of polyethylene glycol ethers is 10% by weight and (E) 13 percent by weight of water, as said water softening agent, in such an amount that said alkaline aqueous solution contains from 3 to 5 gm per liter of said composition.