L'oreal Professionel Dia Richesse colour range is 100% Amonia Free and perfect for those with less than 70% white hair. Featuring 69 beautiful colour shades which can last up to 6 weeks. This product is perfect for reaching your desired shade and lightening up to 1.5 levels. A technique which uses a tone on tone colouration process helping illuminate your natural hair colour.  Directions of use: - To be used by professional stylists -Depending on the service provided by your professional hairdresser total service time may vary.