Formulating shampoo bars: the search for optimal surfactant combinations

Shampoo bars present a sustainable alternative to liquid shampoos due to minimal use of water and the reduction of the product’s volume and weight. Shampoo bars must be consistent in performance and stability. Increasing demand for shampoo bars is not matched by research into their optimisation. The aim of this project was to test a series of solid surfactant combinations and their ability to provide stable shampoo bars that meet consumer demands.