DIA Developers

L'Oréal Professionnel's DIA Proofing agents (oxidants) are professional products designed to work with DIA Light and DIA Color colorants. They provide a gentle effect, even color distribution and mirror shine. Available in 6 Vol (1.8%), 9 Vol (2.7%) and 15 Vol (4.5%) concentrations for different applications: toning, neutralizing or light lightening. The creamy texture makes it easy to apply and the gentle formula protects the hair and scalp. Ideal for colored and lightened hair.