In this paper, 19 females who use sun protection cosmetics on a daily basis were selected as the research subjects. Relevant data on the selection and use of su
In this paper, the preparation of tea tree oil and salicylic acid anti-acne cream was studied. The single emulsifier, compound emulsifier, thickener in the acid
The concept, basic elements, and basic principles of experimental design ofcosmetics human efficacy evaluation were summarized.The commonly used types and key p