PROBLEM TO BE SOLVED: To provide an excellent skin external preparation which is well balanced with respect to most of the evaluation attributes (which may not necessarily be all) such as foamability, an irritating feeling, foam durability, liquid dripping, extensibility, elasticity, viscosity, and flexibility.SOLUTION: The foamable skin external preparation of preparing two or more agents before use includes a particulate substance containing a water soluble acid and a viscous composition containing a carbonate, water and a thickening agent, and this viscous composition includes lambda-carrageenan, iota-carrageenan, and xanthan gum as thickening agents and does not include at least kappa-carrageenan.COPYRIGHT: (C)2013,JPO&INPIT【課題】発泡力、刺激感、発泡持続性、液垂れ、伸展性、弾力性、粘り気、柔軟性などの大部分の評価項目(必ずしも全てでなくてもよい)においてバランスよく優れた皮膚外用剤を提供する。【解決手段】本発明によれば、二剤以上を用時調製する型の発泡性皮膚外用剤が提供される。この発泡性皮膚外用剤は、水溶性酸を含む粒状物と、炭酸塩、水及び増粘剤を含む、粘性組成物と、を含む。また、この粘性組成物は、増粘剤として、ラムダカラギーナンと、イオタカラギーナンと、キサンタンガムと、を含み、少なくともカッパーカラギーナンは含まない。【選択図】なし
