T/GDCA 026-2023 Methodology for assessing the effectiveness of hair-care products in preventing breakage of hair
T/GDCA 026-2023 Methodology for assessing the effectiveness of hair-care products in preventing breakage of hair
Basic Information
Scope
Scope: This document specifies an evaluation method for assessing the anti-hair breakage efficacy of hair care products using isolated human hair strands. This document is applicable to the evaluation of the anti-hair breakage efficacy of hair care products in improving or reducing hair breakage and split ends. 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 conditions and environment 8 Test methods 8.1 Hair breakage test 8.2 Hair split ends test 9 Data analysis 10 Judging criteria 11 Test report Appendix A (informative) Method of preparing damaged hair A.1 Reagents A.2 Preparation method Appendix B (informative) Amount of samples and sampling method