THE STRATUM CORNEUM 251 4O 10 I , , I I 2• 40 60 80 10 5 Uptake (%) Figure 5. (tn) intrinsic (D,) and (o) mean (•) diffusion coefficient of water vapor in stratum corneum (female, age 20) as a function of concentration at 32øC
252 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS 3o I o o x 20 o r• 10 40 50 I lOO CONCENTRATION (%) Figure 6. Mean desorption diffusion coefficient (Dd) of toluene vapor in stratum corneum (female, age 20) as a function of concentration, at 23øC
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