Abstract
The epidermal stratum corneum behaves as a very important element for the skin impedance, and therefore adequate study of the electrical properties of the stratum corneum is required.
The essential points of this paper are written with detailed consideration given to the following items :
(1) The distribution function of relaxation times on vector impedance loci of the stratum corneum is induced, and it is found that this function of thin layer does not satisfy the Cole-Cole circular arc law.
(2) The average dielectric constant and the average resistivity of the stratum corneum and the inner organization underlying granular cell layer are shown respectively, and the various dielectric dispersions in every part of the skin layer are made clear.
(3) The resistivity distribution of the stratum corneum is given by a mathematical equation as follows :
ρ=ρ0e-αχ
where χ is the distance from the skin surface, and where values of attenuation coefficient α and resistivity ρ0 on the skin surface are show. The stratum corneum forming a large resistance layer can become a current barrier, compared with the inner organization underlying granular cell layer having considerably lower resistance.
