SoColor Sync is our unique Ammonia-free, tone-on-tone colour, and our first colour ever to contain a built-in primer to even the hair's canvas for seamless colour and brilliant shine that lasts up to 20 washes. With a new, richer, more comprehensive palette of 59 shades, including 20 new shades, there's a Color Sync shade for every client. It contains our unique cera-oil priming complex, a built-in primer that evens the hair's canvas for seamless colour and brilliant shine that lasts up to 20 shampoos. Works harmoniously with our permanent colour ranges: SOCOLOR.beauty, COLORINSIDER and SOBOOST. SoColor sync is perfect for Refreshing mid-lengths & ends Toning blondes colour correction in just 20 minutes. Formulas are ammonia-free and fade true to tone. Perfect for refreshing mid-lengths and ends to keep colour fresh for longer. 2x conditioning which lasts up to 20 shampoos. 100% oxidate dyes, fade resistant & stay true to tone. Refresh your Dimensional Brunettes to keep colour fresher for longer. Mix with Color Sync Activator with a ratio of 1:1. Development time is up to 20 mins.