How do the rice protein and the keratin fixing balm change the colour outcome and hair feel?

Rice protein is a film-forming, hydrolysed protein that deposits on the hair shaft during the colouring process. Because it has an affinity for both the keratin in hair and the oxidative dye molecules, it creates a more uniform surface for the pigments to latch onto. The practical effect is that the colour develops more evenly from root to tip, reducing patchiness — especially on porous ends — and the final shade appears more saturated and luminous rather than muted. After rinsing the colour, the included fixing balm delivers keratin and vitamins directly to the freshly coloured hair. Keratin fills microscopic gaps in the cuticle lifted by the alkaline developer, so the hair surface feels smoother and reflects light more uniformly, which reads as gloss. The vitamins (typically panthenol and vitamin E derivatives in such balms) add humectant and antioxidant support, helping the hair retain moisture and reducing the rough, straw-like texture that often follows permanent colour. Used together, these two steps mean you get both the depth of a permanent dye and a conditioned finish that usually requires a separate mask or salon treatment.