PROBLEM TO BE SOLVED: To provide a method for improving the brittleness of a film which a skin care preparation of a water-in-oil emulsion type forms because there might be a factor of the brittleness of the film which the skin care preparation forms that does not originate in an aqueous component in the skin care preparation of the water-in-oil emulsion type.SOLUTION: The skin care preparation of the water-in-oil type emulsion dosage form includes nano hollow particles comprising silica husk, wherein the skin care preparation of the water-in-oil type emulsion dosage form preferably includes 1-20 mass% of the nano hollow particles comprising the silica husk.COPYRIGHT: (C)2013,JPO&INPIT【課題】油中水乳化剤型の皮膚外用剤に於いては、水性成分に由来しない、皮膚外用剤の形成する被膜の脆弱化要因が存する場合があり、油中水乳化剤型の皮膚外用剤が形成する皮膜の脆弱性を改善する手段を提供する。【解決手段】シリカ殻からなるナノ中空粒子を含有することを特徴とする油中水型乳化剤形の皮膚外用剤であり、かかるシリカ殻からなるナノ中空粒子は油中水型乳化剤形の皮膚外用剤中に1~20質量%含有することが好ましい。【選択図】なし
