Skin Temperature and Amount of Perspiration as Factors Influencing Sebum Excretion

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Abstract
Where there were opportunities for emulsification of sweat and sebum, the amount of sebum or ether-soluble substances was compared on both the sweating and the control site together with the skin temperature estimates. The amount of sebum on the sweating site of the back was sometimes more and sometimes less than those on the control site when measured without consideration of the skin temperature estimates. When the skin temperature on the sweating site was lowered below the melting point of sebum, and that on the control site elevated above the melting point of sebum, the amount of sebum was found to be smaller on the cooled sweating site than that on the heated control site. The amount of sebum on the sweating site and the control site was found to be equal when the skin temperature on both sites was kept nearly the same, above the melting point of sebum. The amount of ether-soluble substances on the sweating site palm was greater than that on the control site palm, while the skin temperature was lower on the sweating site than that of the control. Sebum or ether-soluble substances of the back of horse was greater on the sweating site than on the control site, while the skin temperature was lower on the sweating site than on the control site.

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