From NC State University:
Finding the next generation of safer hair dyes may be as simple as going to the library – in this case, NC State’s Max Weaver Dye Library. The dye library, donated by the Eastman Chemical Company, contains nearly 100,000 unique dyes waiting to be fashioned into the products of tomorrow.
Researchers from NC State’s College of Textiles and the Department of Chemistry searched the Max Weaver Dye Library for compounds with high chemical similarity to known reference hair dyes. Chemical similarity is a measurement of the number of shared structural properties between two compounds. The goal is to discover possible dyes that could be used in next-generation hair-color products that are safer for consumers, stylists and the environment.