COLOURED TRANSPARENT OR TRANSLUCENT COSMETIC COMPOSITION

摘要

A transparent or translucent colored makeup composition comprises a cosmetic base which is transparent or translucent, and one or more coloring agents in such a quantity that the transmittance of a 10 micro m layer of the composition, measured at the wavelength of one of the absorption or diffusion peaks of the colorant is 20-80%. - An INDEPENDENT CLAIM is included for a method of preparing the composition comprising the following steps: - (1) selection of a transparent or translucent cosmetic base; - (2) preparing a series of samples with increasing amounts of dissolved or dispersed colorant; - (3) spreading onto a transparent blade with a 10 micro m deep hollow in it; - (4) optionally removing the excess so as to leave a regular 10 micro m thick layer; - (5) measuring the transmittance at a wavelength corresponding to the maximum of one of the absorption or diffusion peaks of the colorant; - (6) drawing a curve of transmittance against colorant concentration; and - (7) incorporating into the same or a different cosmetic base in liquid state coloring agents in a quantity, determined from the curve for each, that will give a transmittance of 20-80% and more preferably 25-80%.