| 摘要 |
PROBLEM TO BE SOLVED: To provide a collapsible particle collapsing in cleansing and rinsing process and affording a little skin inflammation and a cosmetic composition having remarkably excellent detergent and rinse out properties by including the same. SOLUTION: This collapsible particle comprises by cohesion of at least a part of mixtures of two or more kind of primary particles insoluble in water, and the cohesion of the collapsible particle is collapsed by the lowering of the concentration of water-soluble salt in the water-soluble salt including aqueous solution. The cosmetic composition includes 1 to 25 wt.% of the collapsible particles, >=1.0 wt.% of the water-soluble salts having concentration less than the saturated concentration, surfactants and water.
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