Machine dishwashing process

摘要

PCT No. PCT/EP94/03805 Sec. 371 Date Aug. 26, 1996 Sec. 102(e) Date Aug. 26, 1996 PCT Filed Nov. 16, 1994 PCT Pub. No. WO95/14424 PCT Pub. Date Jun. 1, 1995A machine dishwashing process for cleaning soiled crockery is provided. The process comprises: (1) optionally prewashing the crockery in a prewash zone; (2) washing the crockery in a wash zone with washing liquor; (3) spraying the crockery from the wash zone with a spraying solution; and (4) rinsing the crockery in a clear washing zone. The washing liquor includes used spraying solution from step (3). The spraying solution has an alkali content of at least 0.8 % by weight. An additive which is substantially free of alkali is supplied to the washing liquor to give a concentration in the washing liquor in the presence of the used spraying solution of at least 0.004 % by weight of complexing agent(s) and/or sequestering agent(s).