The SoColor Sync Pre-Bonded tone-on-tone shades are perfectly colour-matched with SoColor Pre-Bonded permanent shades, so you can achieve seamless, root-to-tip colour that lasts and fades on tone. The Alkaline toner range includes over 50 shades from cool Ashes to warming Mochas and vibrant Reds, that last up to 20 shampoos.
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