The Correlativity Between the Efficacy Evaluation of Cosmetics' Preservative System and the Practical Effect

s:[WT5”BZ]30 and 10 samples of cosmetics,which could pass the microbial challenge tests,were traced for 3 to 12 months and detected with anti-microbial in-use contamination respectively.The results showed that all the samples which could pass the challenge tests had excellent preservtive efficacy when stored or used as usual.It revealed that there were good correlativity between the practical preservative effects of the products and the efficacy testing as well as evaluation methods of cosmetics preservative system.