Abstract
Polymethylmethacrylate powders are commonly used to improve the spreadability
and blurring effects of powder foundation cosmetics. In this study, the opacity and
haze effect of four types of polymethylmethacrylate powders and their 10wt% powder
foundation formulation was evaluated. The distorted random hemispherical
particulates with both concave and convex portions showed the highest haze and
opacity value as a single powder substance. And as a formulated phase, the powder
foundation formulation containing particulates with fine pores provided the highest
haze and opacity value. We also examined the quantity of reflected light over the
angular range 20-75° by polarized light
goniophotometry. The total reflected light intensity, surface-reflected light, and
internally reflected light were characterized. These studies demonstrated that
hemispherical PMMA powders produce natural brilliance by creating high internally
reflected light which is similar to the total reflection profile of artificial
skin.
© 2012 Optical Society of Korea
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