T/GDCA 025-2023 Evaluating the effectiveness of hair nourishing products using hair care methods
T/GDCA 025-2023 Evaluating the effectiveness of hair nourishing products using hair care methods
Basic Information
Scope
Scope: This document specifies an in vitro evaluation method for assessing the nourishing effects of hair care products by measuring the combability, friction, and glossiness of isolated human hair. This document is applicable to the evaluation of the effects of hair care products that claim to nourish and improve hair quality, including but not limited to shampoos, hair conditioners, hair masks, hair oils, and hair lotions. Products that claim to nourish hair on other parts of the human body can refer to this document for guidance on their nourishing effects on hair. Main technical content: Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Basic principles 5 Principles 6 Instruments, reagents, and materials 6.1 Instruments 6.2 Reagents and materials 7 Test environment and conditions 8 Test process 8.1 Test description 8.2 Combability test 8.3 Friction test 8.4 Glossiness test 9 Data statistical analysis 10 Judging criteria 11 Test report Appendix A (informative) Hair damage preparation method A.1 Reagents A.2 Preparation method Appendix B (informative) Reference to sample quantity and sampling method References