Elkhyat Ahmed, Courderot-Masuyer Carol, Mac-Mary Sophie, Courau Stéphanie, Gharbi Tijani, Humbert Philippe
Laboratoire d'ingénierie, Hôpital Saint Jacques, Besançon, France.
Skin Res Technol. 2004 Nov;10(4):283-6. doi: 10.1111/j.1600-0846.2004.00084.x.
The skin is responsible for protecting the body from physical, chemical and microbial injuries. The stratum corneum is the top layer of the epidermis and it plays a key role in helping to contain moisture. When the skin becomes damaged, its ability to perform these functions is compromised. Dry skin is a common form of skin damage. Contact angle 0 between a surface and water is a good indicator of hydrophobic or hydrophilic tendency of surfaces.
To quantify the influence of spray application of an isotonic mineral water (Saint GERVAIS water) on the hydrophobic tendency of dry skin and to compare spreading of both types of water on the skin through 0 measurement of each water drop on the skin before and after mineral spray application.
Contact angles theta between skin surface and the two types of water (bidistilled and mineral water) were measured before and after application of mineral water by a system allowing the measurement of theta in vivo and in vitro. The cutaneous hydration, the temperature and pH were also measured before and after mineral water application.
As for the application of mineral water, the cutaneous pH significantly increased so the strong skin acidity decreased. The cutaneous temperature was modified (a decrease of 2 degrees C was noted) and the cutaneous hydration was also increased (+47AU). The hydro-phobic tendency of the dry skin tested in this study was strongly decreased after mineral water application. This parameter was illustrated by a decrease of contact angle theta value.
Saint GERVAIS water application allowed a regulation of skin pH, a fresh sensation on the skin and an increase in the cutaneous hydration. Moreover, the contact angle measurement with bidistilled water illustrated the increased wettability of the skin.
皮肤负责保护身体免受物理、化学和微生物伤害。角质层是表皮的最上层，在保持水分方面起着关键作用。当皮肤受损时，其执行这些功能的能力就会受到损害。干性皮肤是一种常见的皮肤损伤形式。表面与水之间的接触角θ是表面疏水或亲水趋势的良好指标。
量化等渗矿泉水（圣热尔韦矿泉水）喷雾对干性皮肤疏水趋势的影响，并通过测量矿物喷雾应用前后皮肤上每滴水的θ值，比较两种水在皮肤上的铺展情况。
通过一个允许在体内和体外测量θ的系统，测量应用矿泉水前后皮肤表面与两种水（双蒸水和矿泉水）之间的接触角θ。还测量了应用矿泉水前后的皮肤水合作用、温度和pH值。
至于矿泉水的应用，皮肤pH值显著升高，因此强烈的皮肤酸度降低。皮肤温度发生了变化（注意到下降了2摄氏度），皮肤水合作用也增加了（+47AU）。在本研究中测试的干性皮肤的疏水趋势在应用矿泉水后大大降低。这一参数通过接触角θ值的降低得到说明。
应用圣热尔韦矿泉水可调节皮肤pH值，使皮肤有清爽感，并增加皮肤水合作用。此外，用双蒸水测量接触角说明了皮肤润湿性的增加。
