Development of Novel Plate-Like Powder for Cosmetic Applications towards Realizing Both Sheer Coverage and Natural Finish

Abstract

We have developed a new white powder, titanium bis (hydrogen phosphate) (INCI name: Titanium Bis (Hydrogen Phosphate). This titanium bis (hydrogen phosphate) (hereinafter, referred to as titanium phosphate) is a flat plate-like particle having a smooth surface and an aspect ratio of about 8. Since the particles are synthesized using a hydrothermal reaction, the particle size distribution is very sharp and the particle size can be arbitrarily controlled in the range of 0.3 to 7 μm. As to optimizing particle size, by checking the correlation between three properties─particle size, hiding power and soft focus property─we confirmed the particle size of 1 μm works best. Using 1 μm titanium phosphate, we found ‘easiness of spreading’ and ‘blurring the appearance of wrinkles’ ranked highest in the sensory evaluations regarding a powder foundation formulation. Based on the above, this developed titanium phosphate is highly anticipated as a brand-new white functional powder.