DIActivateur 9-Volume developer is fully stabilized to ensure consistent, uniform colour results. Its rich, creamy formula offers gentle, controlled lightening and colouring action. DIActivateur 9-Volume developer is ideal for colour-treated and sensitized hair, for brighter colour, for corrective/pre-colour, for permed, straightened or relaxed hair, and to refresh and tone highlights. Use with Dia Richesse and Dia Light.