Effect of solid detergent washing on values of skin electrical impedance

We have studied the electrical behaviour of the skin on 20 volunteers, before and after cleaning with solid detergent. The aim was to study one of the possible variables of the measurements. The results have shown that the cleaning has globally reduced the electrical skin parameters of the forehead, without influencing other parts examined (dorsal and palmar surfaces of the hand). The result has been attributed to the elimination of the hydrolipidic film of the surface and in particular that of the sebum of the forehead. The data give an idea as to how to obtain more homogeneous final results, as well as studying the sebum production function.