The Matrix SoColor Pre-Bonded permanent hair colour range promises to infuse each and every strand with rich colour and protective nourishment for healthy, smooth coloured hair. Each formula is blended with Bond-Protecting Concentrate which helps to maintain the integrity of the hair structure, colour after colour. The formulas are pre-blended with both background and reflect to help control warmth on every colour, every base, and every underlying pigment. SoColor Pre-Bonded permanent shades and SoColor Sync Pre-Bonded tone-on-tone shades are perfectly matched, so you can achieve seamless, root-to-tip colour that lasts and fades on tone. Key Benefits: ul.kit li {list-style-type: disc; margin-left: 15px;} Pre-bonded, helping to protect the inner hair structure, colour after colour* (*Assessed after 7 applications on sensitised hair) Pre-blended, ensuring all underlying pigments and warmth are neutralized Pre-Paired with our SoColor Sync tone-on-tone range for seamless results from root to tip The SoColor Blended collection gives up to 100% coverage on 50% grey hair, and a blended coverage on up to 100% grey hair Click Here to read the SoColor Pre-Bonded Permanent Colour Technical Guide.