Patent Pick: Soft Brilliance in Layers


Soft-focus effects minimize the visible appearance of wrinkles and imperfections. Cosmetic materials that achieve this effect can do so by light diffraction through pigments, especially through layers of substrates.

However, the key to getting the look "just right" is to do so in moderation. Why? Because too much coverage looks unnatural, as a recent article on matching ethnic skin tones revealed.

Could this new patent application out of Korea provide the right mix of coverage and gloss? 

Coated pigment for soft brilliance
WIPO Patent Application WO/2017/065481
Publication date: April 20, 2017
Assignee: Cosmecca Korea Co., Ltd. and Xentech Co., Ltd.

This invention relates to a composite pigment coated with titanium dioxide (TiO2), a method for producing it and cosmetics containing it. The composite pigment is prepared by first, surface-treating the pigment by hydrolyzing titanium dioxide precursor titanium tetrachloride (TiCl4) thereon so a uniform coating surface is formed.

Then, a second surface treatment is layered on the first pigment, once again by hydrolyzing titanium dioxide precursor TiCl4 thereon and stirring after hydrolysis ends so a non-uniform coating surface is formed. Finally, the composite pigment is coated with TiO2 by firing the second surface-treated pigment and converting TiO(OH)2 to TiO2.

The final composite pigment imparts soft brilliance and hiding power suitable for skin, since the pigment exhibits glossiness of 30-35, which is lower than that of a general pearlescent pigment of 40-45. Further, its hiding power (HAZE value) is a 70-80, which is higher than that of general pearlescent pigments, at 50-60.

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