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China Surfactant Detergent & Cosmetics ›› 2024, Vol. 54 ›› Issue (8): 939-946.doi: 10.3969/j.issn.2097-2806.2024.08.008

• Development and application • Previous Articles     Next Articles

Establishment of an in vitro test and evaluation method for cosmetic foundation

Keying Xiao1,4,Jiajing Cai4,Huimin Zi4,Feifei Wang1,2,3,*()   

  1. 1. Yunnan Botanee Bio-Technology Group Co., Ltd., Kunming, Yunnan 650106, China
    2. Yunnan Characteristic Plant Extraction Laboratory, Kunming, Yunnan 650106, China
    3. Shanghai Jiyan Bio-pharmaceutical Co., Ltd., Shanghai 201702, China
    4. Shanghai Botanee Biotechnology Co., Ltd., Shanghai 200233, China
  • Received:2023-07-18 Revised:2024-07-03 Online:2024-08-22 Published:2024-08-21
  • Contact: Feifei Wang E-mail:wangfeifei@botanee.com

Abstract:

This study aims to establish the methods of evaluating cosmetic foundation in vitro from four dimensions: concealment, dullness, migration resistance as well as the ability of water resistance, sweat resistance and sebum resistance. The automatic film coating machine was used to evenly coat the samples in the first steps. The concealment and dullness sections were evaluated by MetaVue VS3200 spectrophotometer, which measured the hiding rate of the samples and the color characterization values of the foundation (ΔL, Δa, Δb). The coverage rate of sample E1 is 90.98 cr, which is the highest coverage. The ΔL value of sample D2 has the largest change of -2.73 as well as the highest dullness. Combined with the result of consumer testing for further verification, the overall score results are consistent with in vitro test results. Also, the ability of migration resistance was determined and compared by the image analysis of software Image-Pro Plus 6.0 through the testing of the amount of rubbed powder. Moreover, through the contact angle measuring device, the capabilities of water, sweat, and sebum resistance of the foundation samples could be compared based on the measurement of the contact angles of deionized water, artificial sweat, and artificial sebum on the sample surface. The contact angles of sample B1 and D2 with deionized water and artificial sweat are greater than 90° for removal of lipophilicity. The contact angles of all samples are less than 90° for removal of lipophilicity, among which sample E1 and sample F are relatively lower in removal of lipophilicity, and the contact angles are respectively 40.8° and 40.0°. The results of water resistance, sweat and sebum tested in this study are generally consistent with the test results based on existing literature. The results show that four methodologies of scientific measurement with instruments are feasible and valid, and they help develop the convenience and scientific rigor of in vitro evaluation.

Key words: in vitro testing, coverage, dullness, anti-migration

CLC Number: 

  • TQ658