WASHING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a washing method by which excellent washing performance to stain derived from a human such as collar stain or sleeve stain can simply be obtained. SOLUTION: (a) A material to be washed is brought into contact with a pre-treating agent composition containing 1-30 wt.% chelating agent and water and (b) the pre-treated material to be washed is brought into contact with after-treating composition containing 0.005-0.2 wt.% surfactant and water.