PROBLEM TO BE SOLVED: To provide a preparation method of soap, for achieving efficient blending of compositional ingredients of a cosmetic and obtaining a higher beauty effect.SOLUTION: In a test method measurement by an HPLC method, the cosmetic contains, as chemical substances included therein, phenoxyethanol blended by 0.007 g or less in 100 g and methylparaben blended by 0.001 g or less in 100 g so that the influence on a human body does not occur even when foams after the use of cosmetic remains on the human body in order to effectively make silk amino acid and lauric acid, which can be expected to develop a beauty effect, permeate a corium layer.COPYRIGHT: (C)2013,JPO&INPIT【課題】化粧品の組成成分の配合を効率化し、さらなる美容効果を目指す石鹸の製法の提供。【解決手段】美容効果が期待できるシルクアミノ酸、ラウリン酸を効果的に真皮層にまで浸透させるため、化粧品使用後の泡を人体に付着させたままでも人体への影響がないよう、HPLC法による試験方法測定において含有化学物質であるフェノキシエタノールを100グラム中0.007グラム以下とし、メチルパラベンを100グラム中0.001グラム以下の配合とした。【選択図】なし
