HUMAN SKIN UV/VIS REFLECTION SPECTRA 41 RELATIVE REMITTANCE % 0 0 0 0 ' Heme (415 nm)• k Oxy-hemoglobine (541 nm) ½x $ Desoxy-hemoglobine (560 am)t •' J Figure 2b. Standardized spectrum of skin site (a, Figure 2a) and of a sunburned skin site (b) (approximate absorption wavelengths of main skin chromophores are indicated).

42 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 30 25 2O % lO 5 o 250 300 350 400 450 500 550 600 650 700 750 WAVELENGTH [NM] average- stdv. i average m average + stdv. 12 ................................ 10- 8- 6- 4- 2- ß 1111111111111111111111111111 I 250. 300 350 400 450 500 550 600 650 700 750 WAVELENGTH [NM] EE3 relative stdv. Figure 3. Intraindividual variation coefficient spectra recorded with the 1% transmission filter of the instrument (stdv. = standard deviation). nm, parallel to increasing numbers of cyanoacrylate strips removed from skin. Reflec- tivity in the range of 300 nm is decreased less, and the decrease is barely visible in the range of 350 nm (Figure 7). An analogous behavior is observable after removal of tape strips.