New Insights into the Essential Reason of Liquid Foundation Darkening from the Powder Point of View

Perfect base makeup is the guarantee of exquisite makeup.However,the problem of base makeup darkening seriously affects the cosmetic effect,and also troubles many researchers and consumers.In this paper,a basic liquid foundation was chosen as model to explore the darkness reason from the aspects of foundation hue,volatility of emulsification system,and sebum secretion.DEcmc value determined by non-contact colorimeter was used to monitor the process of darkness.It’s widely accepted that foundation oxidation is key to darkness.We herein report a new insight into the essential reason of darkness due to the interaction between light and foundation.The red hue of the foundation darkened faster because the human eyes were more sensitive to the color difference of red.The volatility of foundation emulsion system and skin sebum secretion accelerated the foundation darkening process,which was caused by the change of foundation surface structure.Considering the above influencing factors,the formula was adjusted and an improved formula was proposed,which could significantly reduce the process of foundation darkening.

从粉体角度探究底妆暗沉的本质原因

完美底妆是精致妆容的保障,底妆暗沉问题严重影响着即时妆效,也困扰广大研究者和消费者。为此制备了基础粉底液,比较不同色相粉底暗沉情况,讨论粉底乳化体系挥发和皮肤出油对暗沉的影响,并采用非接触色差仪监测粉底的色差值,从而探究影响粉底暗沉的因素。结果表明,粉底暗沉并非是氧化造成。红色相的粉底暗沉更快,是因为人眼对于红色色相变化更敏感。体系挥发和皮肤油脂分泌会加速粉底暗沉进程,是粉底表面结构变化引起的。基于以上因素理解,对基础配方进行调整,提出改良配方,显著减缓了粉底暗沉的进程。

几款疏水疏油型钛白粉性质研究

从接触角、吸油值、柔焦效果、白度、遮盖力、肤感等方面对比几款疏水疏油型钛白粉的差异,结果显示,Ti-02FL在柔焦效果、肤感等方面表现较好,Ti-02F在持妆性、光泽度方面表现较好,Ti-02FAS白度和遮盖力最佳,Ti-02FM从使用性能到肤感均表现不佳。表面处理剂方面,使用含氟处理剂可以提高最终产品的持妆性,氢化卵磷脂可以提高贴肤性,三乙氧基辛基硅烷可以提高粉末的亲油性和白度。通过选择合适的处理剂与含氟处理剂复合处理,可以达到降低应用难度和提高使用效果的统一。