Birch, Stewart, Kolasch & Birch, LLP
Washing method and detergent compositions
 A washing method characterized in that washing is carried out under conditions that a pH of a washing liquid starts increasing after a water hardness of the washing liquid starts decreasing; a detergent composition characterized by containing particles capable of delayed-exerting an alkalizing effect of a washing liquid, wherein a pH of a washing liquid starts increasing after a water hardness of the washing liquid starts decreasing; and a detergent composition comprising an alkalizing agent coated with an organic material, or organic and inorganic materials, the alkalizing agent occupying an amount of 70% by weight or more of the entire alkalizing agents in the detergent composition. In the washing method and the detergent composition of the present invention, since washing is carried out under conditions that a pH of a washing liquid starts increasing after a water hardness of the washing liquid starts decreasing, excellent detergency can be achieved even at a low surfactant concentration in a washing liquid. 
KAO Corporation
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Shigeru Yoko Shu Hiroyuki Masaki Katsuhiko
Tamura Yamaguchi Yamaguchi Yamashita Tsumadori Kasai