Cosmetic preparation

A cosmetic, wherein the cosmetic comprising tetraquistrimethylsiloxysilane prepared by subjecting tetraalkoxysilane represented by the following formula (A) and hexamethyldisiloxane represented by the following formula (B),

• Si(OR)4 (A)
• ,wherein R is a monovalent hydrocarbon group having 1 to 10 carbon atoms,
• (CH3)3SiOSi(CH3)3 (B)
• to a reaction according to a method comprising the steps of
• (1) mixing 2 to 10 moles of hexamethyldisiloxane and 0.01 to 0.5 mole of an acid catalyst, per mole of tetraalkoxysilane, and adjusting a temperature to a temperature ranging from 0° C. to below 30° C.,
• (2) adding 1 mole of tetraalkoxysilane to the system obtained in the step (1),
• (3) adding 2.5 to 10.0 moles of water to the system obtained in the step (2) while keeping a temperature of from 0° C. to below 30° C. and subjecting to a reaction for 30 minutes to 5 hours, and
• (4) subjecting to a reaction for 30 minutes to 5 hours at a temperature of from 30° C. to 100° C.