What is the difference between permanent and semi-permanent colours?
• A) Permanent Tints: Must be mixed with hydrogen peroxide to lift hair colour. The peroxide opens the hair cuticle so that the tint can penetrate the cortex and form the colour. The higher the level of peroxide, the quicker and lighter the result. • B) Semi-Permanent Colours: They don’t actually lift the colour – you can either vary the tone within your natural highlights or go darker. Quasi-colour contains ethanolamine and 3% peroxide, which slightly opens the cuticle. This means that the colour can last up to 20 washes and will softly fade as you shampoo, causing no regrowth problem.
