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KMID : 0984920090110020121
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Journal of Skin Barrier Research
2009 Volume.11 No. 2 p.121 ~ p.121
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Change of the skin pH, TEWL and capacitance at the early stage of exposure with soap and cleansing foam
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Park Hyeon-Young
Kim Yeon-Ju
Kim Seong-Jin
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Abstract
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Soap and cleanser removes dirts, sweat, microorganisms and exfoliated corneocytes from upper most part of the skin. It was known that long term exposure of water or surfactant irritation induces skin barrier damage. However there was not sufficient data about very early stage of skin change after applying soap and cleansing foam. In this study we measured with the skin pH, transepidermal water loss (TEWL) and capacitance to see any dynamic changes within one hour after single exposure of soap and cleansing form. A total 23 volunteers were measured with skin bioengineering devices at both face and hand dorsum before and after washing until reach to one hour (before, immediately after, 15min, 30min, 60min). The skin pH was increased immediately but soon returned to the initial level, yet the highest pH following washing stays
within pH 6 in both areas. Similarly the level of TEWL and capacitance also showed same tendency or patterns as shown as the pH change. Though being exposed to the surfactant is responsible for skin barrier damage, present results suggested that normal skin condition was not affected by soap and cleansing foam when given at single exposure mode. Thus, either repeat or intense exposure of soap and cleansing foam toward weakened skin area is important for
barrier damage in the real life condition.
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KEYWORD
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Skin pH, TEWL, Soap, Cleansing form
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