Abstract: The present invention relates to a hair cosmetic containing the following components (A) to (E): (A) a compound represented by the following general formula (1) or a salt thereof: wherein a broken line represents the presence or absence of a ? bond; R1 represents a hydroxy group or an acetoxy group; R2 represents a hydrogen atom or —COOR (R is a hydrogen atom, a methyl group, or an ethyl group); and R3 represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group; (B) an alkaline agent; (C) a buffering agent; (D) an anionic surfactant; and (E) a cationic polymer having a cation charge density of 0.01 meq/g or more and 4.8 meq/g or less, a mass ratio of the component (A) to the component (E) [(A)/(E)] being 0.05 or more and less than 2.

Abstract: The present invention relates to a hair cosmetic containing the following components (A) to (E): (A) a compound represented by the following general formula (1) or a salt thereof: wherein a broken line represents the presence or absence of a ? bond; R1 represents a hydroxy group or an acetoxy group; R2 represents a hydrogen atom or —COOR (R is a hydrogen atom, a methyl group, or an ethyl group); and R3 represents a hydrogen atom, an acetyl group, a methyl group, or an ethyl group; (B) an alkaline agent; (C) a buffering agent; (D) an anionic surfactant; and (E) a cationic polymer having a cation charge density of 0.01 meq/g or more and 4.8 meq/g or less, a mass ratio of the component (A) to the component (E) [(A)/(E)] being 0.05 or more and less than 2.

Abstract: A magnetic recording medium having a nonmagnetic polymer substrate, a magnetic layer and a backcoating layer, wherein surface profile of the magnetic and the backcoating layers satisfies the following condition (i), and the nonmagnetic polymer substrate satisfies the following conditions (ii) and (iii): (i) the skewness of the surface roughness profiled of the backcoating layer is greater than that of the magnetic layer; (ii) the nonmagnetic polymer substrate has a molecular orientation ratio of 1.11 or greater; and (iii) the angle between the main axial direction of the polymer chains in the nonmagnetic polymer substrate and the longitudinal direction of the nonmagnetic polymer substrate is 7.degree. or smaller, has excellent electromagnetic conversion characteristics and running stability.