Abstract: It is an object of the invention to provide a hair cleanser that has a high cleansing effect on hairdressing preparation and can provide smoothness to the hair. A hairdressing preparation cleanser comprising: (a) a component with the IOB value of 0.6 to 1.5; (b) a cationic polymer; and (c) a sequestering agent. It is preferable that said component with the IOB value of 0.6 to 1.5 is one or a combination of more than one selected from the group consisting of random alkylene oxide derivatives, and said cationic polymer is one or a combination of more than one selected from the group of starch hydroxypropyltrimonium chloride, cationized hydroxyethyl cellulose-2, polyquaternium-39, and polyquaternium-7. It is preferable that citric acid and triethanolamine are additionally contained.

Abstract: The purpose of the present invention is to provide the external preparation for skin sufficiently exhibits a moisturizing function and skin improvement function of a specific quaternary ammonium salt.Therefore, the external preparation for skin in accordance with the present invention comprising a quaternary ammonium salt which is shown in following constitutional formula (I), has an enhancer of moisturizing effect and skin roughness improvement effect of a quaternary ammonium salt selected from the group of vitamin E types, vitamin A derivatives, and alkyl denatured carboxyvinyl polymer. ##STR1## (wherein R.sup.1, R.sup.2, and R.sup.3 show alkyl groups having a carbon number from 1 to 6. A sum total of the carbon number of R.sup.1, R.sup.2, R.sup.3, and n is 8 or less. Each carbon number of R.sup.1, R.sup.2, and R.sup.3 can be same or different).

Abstract: A hair revitalizing tonic having an excellent hair loss prevention and hair revitalizing effect comprising (1) an amine oxide or (2) an amine oxide and an anionic surfactant formulated therein.