Institute for Experimental Dermatology, DermaTronnier, at the Witten/Herdecke University, Witten, Germany.
UV-Technik, Hanau, Germany.
Skin Pharmacol Physiol. 2019;32(5):244-253. doi: 10.1159/000501131. Epub 2019 Jul 22.
About 50% of the sun's radiation arriving on earth is visible light (VIS). For a long time, its effects on human health have not been fully investigated. But recently, the influence of VIS has gained more attention, especially regarding skin physiology. Studies showed various effects, many of them harmful, comparable to UV radiation. As a result, there are now a few sunscreens commercially available which claim protection against VIS. The question of whether protection is necessary is still much discussed.
The objective of this study was to develop an easy-to-perform high-energy visible (HEV) and low-end visible (LEV) light transmittance method to determine the direct VIS protection of sunscreens and other cosmetic samples. Furthermore, the influence of the brightness of the tested products on the HEV, LEV, and infrared A protection was investigated.
An experimental setup consisting of a light source, a VIS-transmissible filter system, and a sensor unit was built to measure the direct VIS protection of sunscreens and other daily skin care products in two ranges of the VIS area. For a closer look, the brightness of the samples was evaluated by photometric assessment.
RESULTS/CONCLUSION: The experimental setup could be validated. It could be demonstrated for the first time that there is a strong positive linear correlation between transmittance and brightness of tinted sunscreen and daily skin care products with sunscreen properties in the HEV, LEV, and infrared A range. However, tinted samples worked best in the blue light region, and the higher the wavelength range, the lower the protection.
到达地球的太阳辐射约有 50%是可见光(VIS)。长期以来，其对人类健康的影响并未得到充分研究。但最近，VIS 的影响引起了更多关注，尤其是在皮肤生理学方面。研究表明，VIS 具有多种影响，其中许多是有害的，可与紫外线辐射相媲美。因此，现在市面上有一些声称具有 VIS 防护功能的防晒霜。是否需要防护的问题仍在激烈讨论中。
本研究旨在开发一种易于操作的高能量可见光（HEV）和低能可见光（LEV）透光率方法，以确定防晒霜和其他化妆品样品的直接 VIS 防护性能。此外，还研究了测试产品的亮度对 HEV、LEV 和红外 A 防护的影响。
构建了一个由光源、VIS 可透射滤光系统和传感器单元组成的实验装置，以测量防晒霜和其他日常护肤品在 VIS 区域的两个范围内的直接 VIS 防护性能。为了更详细地了解情况，通过光度评估评估了样品的亮度。
结果/结论：实验装置得到了验证。首次证明，在 HEV、LEV 和红外 A 范围内，有色防晒霜和具有防晒功能的日常护肤品的透光率与亮度之间存在很强的正线性相关性。然而，有色样品在蓝光区域效果最佳，波长范围越高，防护效果越低。
