Dr. Trefor Evans has worked in the hair care industry for over 25 years. The first 16 of these were spent as a scientist and manager in the product development labs of large consumer good companies (Helene Curtis and Unilever). He then served for five years as Director of Measurement Services at TRI-Princeton (TRI), where he now holds the titles Director of Research and Institute Fellow and is responsible for TRI’s Research Program.
Dr. Evans holds a Ph.D. in Physical-Analytical Chemistry and has spent his career using measurement science to support the development, launch and maintenance of many international cosmetic brands and products. These activities include fundamental research, supporting product development efforts, substantiating and validating marketing claims, and a variety of miscellaneous problem-solving.
Dr. Evans is highly active in the hair care industry through many working relationships with companies of all shape and size. He is a regular presenter at International Hair Conferences and has been an invited speaker at many technical meetings and symposia. He was Chairman of both the 6th and 7th International Conference on Applied Hair Science – and will have the same role for next year’s 8th iteration of this same event.
Dr. Evans has published numerous articles in trade magazines and the scientific literature and is co-author and co-editor of the book “Practical Modern Hair Science”. He writes a regular column on Hair and Hair Testing for Cosmetics & Toiletries magazine – and also sits on this publication’s advisory board. He is Technical Editor for the Journal of Cosmetic Science, and also serves on the Expert Reviewing Panel for International Journal of Cosmetic Science and the Textile Research Journal. He holds seven patents in the area of hair care and his research work has been awarded by the Society of Cosmetic Chemists on three separate occasions.
For the past 10 years, Dr. Evans has facilitated and taught TRI’s two annual training classes on Hair Science and Product Claims which have been held in the US and Europe. He guest lectures on the subject of Hair and Hair Science at a variety of academic cosmetic programs and has instructed at events organized by the Society of Cosmetic Chemists.