Abstract: Provided is a composition containing the following components (A), (B) and (C) and suppressing formation of scum during cleansing, wherein a weight ratio of (A)/(B) is 0.2-5 and a weight ratio of ((A)+(B))/(C) is 0.01-10: (A) N-lauroyl glycine or a salt thereof (B) N-myristoyl glycine or a salt thereof (C) N-acyl acidic amino acid having an acyl group having 8 to 24 carbon atoms, or a salt thereof.

Abstract: Cleansing material compositions which contain an acyl acidic amino acid or a salt thereof, an amphoteric surfactant, and hydroxypropyl starch phosphate, and have a pH of 5.3 or less are useful for facial cleansing.

Abstract: Hair cleansing agents containing the following components (A) to (E) and water: (A) not less than 3 wt % and not more than 12 wt % of one or more kinds selected from the group consisting of acyl isethionate and ?-olefin sulfonate (B) not less than 0.5 wt % and not more than 10 wt % of acyl acidic amino acid or a salt thereof, (C) not less than 0.005 wt % and not more than 0.8 wt % of a cationic polymer, (D) not less than 0.25 wt % and not more than 3 wt % of one or more kinds selected from the group consisting of dibasic acid, PCA and salts thereof, and (E) an inorganic salt, are superior in foaming performance, imparting conditioning property in a series of hair washing processes of washing, rinsing and drying, and hair appearance after drying.

Abstract: Provided is a composition containing the following components (A), (B) and (C) and suppressing formation of scum during cleansing, wherein a weight ratio of (A)/(B) is 0.2-5 and a weight ratio of ((A)+(B))/(C) is 0.01-10: (A) N-lauroyl glycine or a salt thereof (B) N-myristoyl glycine or a salt thereof (C) N-acyl acidic amino acid having an acyl group having 8 to 24 carbon atoms, or a salt thereof.

Abstract: The problem of the present invention is provision of a cleansing composition providing good amount and good quality of lather. Using a particular alkenoic acid or a salt thereof, the above-mentioned problem can be solved. In addition, the cleansing composition provided by the present invention is stable in various formulations and also useful for rough skin and damaged hair.

Abstract: Combining a particular alkenoic acid or salt thereof with a sugar type surfactant and/or sulfate type surfactant affords a liquid cleansing composition which provides a good amount of lather and a superior moist feeling after washing.

Abstract: Provision of an N-acyl basic amino acid dispersion superior in dispersibility. The present invention provides a production method of an N-acyl basic amino acid dispersion having a pH of 2 to 12, comprising (1) a step of dissolving an N-acyl basic amino acid in a base solution, and (2) a step of mixing the obtained N-acyl basic amino acid solution with one or more equivalents of an acid relative to the base.

Abstract: The problem of the present invention is provision of a cleansing composition providing good amount and good quality of lather. Using a particular alkenoic acid or a salt thereof, the above-mentioned problem can be solved. In addition, the cleansing composition provided by the present invention is stable in various formulations and also useful for rough skin and damaged hair.

Abstract: The present invention aims to provide a liquid cleansing composition showing a good amount of lather and superior in a moist feeling after washing. The present inventors have found that the above-mentioned problem can be solved by combining particular alkenoic acid or a salt thereof with a sugar type surfactant and/or a sulfate type surfactant.

Abstract: Provision of an N-acyl basic amino acid dispersion superior in dispersibility. The present invention provides a production method of an N-acyl basic amino acid dispersion having a pH of 2 to 12, comprising (1) a step of dissolving an N-acyl basic amino acid in a base solution, and (2) a step of mixing the obtained N-acyl basic amino acid solution with one or more equivalents of an acid relative to the base.

Abstract: A nonlinear optical crystal device, a wavelength conversion element, is surrounded with a heat sink having cooling fins. Cartridge heaters for uniformly heating the nonlinear optical crystal device are arranged in the heat sink, and the temperature of the cartridge heater is regulated by a heater controller. Laser light is input into the nonlinear optical crystal device, and delivered therefrom after its wavelength is converted into a shortened wavelength. When the repetition frequency of laser light is high, heating by the heaters is stopped, and cooling is effected with the heat sink. When the repetition frequency of laser light is low, heating by the heaters is carried out to maintain the temperature of the nonlinear optical crystal device to be a temperature at which a conversion efficiency is satisfactory.

Abstract: A nonlinear optical crystal device (21), a wavelength conversion element, is surrounded with a heat sink (22) having cooling fins (23a, 23b, 23c). Cartridge heaters (24) for uniformly heating the nonlinear optical crystal device (21) are arranged in the heat sink (22), and the temperature of the cartridge heater (24) is regulated by a heater controller (30). Laser light is entered into the nonlinear optical crystal device (21), and delivered therefrom after its wavelength is converted into a shortened wavelength. When the repetition frequency of laser light is high, heating by the heaters (24) is stopped, and cooling is effected with the heat sink (22). When the repetition frequency of laser light is low, heating by the heaters (24) is carried out to maintain the temperature of the nonlinear optical crystal device (21) to be a temperature at which a conversion efficiency is satisfactory.