In our last article, Is Your Scalp Healthy? – Scalp Health Evaluation Methods (Part I), we have introduced the evaluation methods for dandruff, sebum levels, and itchiness. In this article, we will continue with the evaluation methods for erythema/papules/pustules and the overall hair status.
In this article, we would like to share the hair thermal damage model conducted by CIRS Testing and Amway (Shanghai), as published in the Journal of Cosmetic Dermatology. The frequent use of hair dryers can cause thermal damage to the hair. Currently, there are various hair care products aimed at repairing thermal-damaged hair emerged on the market, making it necessary to establish a convenient and stable hair thermal damage model to evaluate the efficacy of such products.
On July 31, 2025, the National Institutes for Food and Drug Control (NIFDC) released six draft Technical Guidelines for public consultation, including the Technical Guidelines for the Study of Hair Dye Cosmetics (Trial). In terms of perm hair cosmetics, according to the relevant guidelines, the definition and classification of them have been clarified.
Collaborative research on a hair heatrf damage model, jointly conducted by Hangzhou C&K Testing Technic Co., Ltd. (CIRS Testing) and Amway (Shanghai) Innovation and Science Co., Ltd. (Amway), has achieved significant progress. The findings have been formally published in the internationally authoritative SCI-indexed journal- Journal of Cosmetic Dermatology. This breakthrough study not only provides a novel scientific tool for in-depth exploration of hair heat damage mechanisms but also marks a new level of global recognition for China’s cosmetic efficacy evaluation technology within the international academic community.
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