being the results values 1.8 and 9.5 mW/cm2 respectively.
An erythemal irradiance of 0.5 mW/cm2 has been measured by an erythema like radiometer [19],towhichcorrespondtoadoseof 3, 9, 15 and 30 SED for the four different exposure times
Table 1 RMS surface roughness of the different materials tested.
RMS surface roughness (mm) In Vivo Skin 16.30.2 Transpore1 7.30.5 Vitro-SkinTM 16.10.3 Roughened quartz 1.80.1 PMMA plates 2.60.1 PTFE 4.70.1
Fig. 1. (20 optical zoom) (a) In vivo microscopic image of skin; (b) microscopic image of Transpore 3M; (c) microscopic image of hydrated Vitro-Skin; (d) microscopic image of not-hydrated Vitro-Skin; (e) microscopic image of roughened quartz; (f) microscopic image of roughened PMMA plate; (g) microscopic image of one PTFE sample.
Table 2 Sunscreens main ingredients.
SPF 4 SPF 6 SPF 8 SPF 12 SPF 15 SPF 20 SPF 30
Bis-ethylhexyloxyphenol methoxyphenyl triazine X X X X X Butyl methoxydibenzoylmethane X X X X X X X Disodium phenyl dibenzimidazole tetrasulfonate X X Ethylhexyl methoxycinnamate XX Ethylhexyl triazone X X X Octocrylene X X X Titanium dioxide XXXX
D