HUMAN SKIN UV/VIS REFLECTION SPECTRA 43 50 •9. a = mean + standard deviation • b = mean remittance f,.) 40 c = mean - standard deviation 30 - 20- _ 25O lø I 300 350 400 450 500 WAVELENGTH [NM] Figure 4. Interindividual variations of untanned lower forearms. 550 6OO o _ -5- -10 250 275 300 325 350 375 400 425 450 475 500 525 550 WAVELENGTH [NM] Figure 5. Variation coefficient of data illustrated in Figure 4 (assuming linear and normal distribution).

44 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 50- 40 30- /,, 20 . L•. d l'' d = •orehead '• •/ e= backside of hand o 250 300 350 400 450 500 550 600 650 700 750 WAVELENGTH [NM] Figure 6. Standardized reflection spectra of different skin sites. 290 - 240- • 190- r.T..1 14o- •1 90- 40 250 275 300 325 350 375 400 425 450 475 500 WAVELENGTH [NM] Figure 7. Normalized spectra of lower forearms after cyanoacrylate stripping (a-d = 1-4 strips removed).

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