ISSN:
1468-2494
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Medicine
Notes:
Measurements were carried out on 19 commercial cosmetic samples. Initially, their anti-infrared properties were quantified, in vivo, on healthy volunteers, by measuring variations in the Colorimetric Erythema Index ΔCEI, before and after application of a normalized quantity of product. Subsequently, the physico-chemical response of the product was tested in vitro by measuring the infrared reflection coefficient ΔIR at 800 nm.The correlation established between these two parameters enables products to be ranked in three categories. A good correlation was demonstrated between reflective power (ΔIR) and anti-erythemic properties (—ΔCEI) of the products in the first two groups.A qualitative examination of the diffraction of X-rays confirms the presence of titanium dioxide, TiO2 rutile, in most products with high IR protection properties whereas TiO2 anatase was detected in a sample with no IR reflection properties.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1467-2494.1994.tb00089.x
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