Trimmers Hair Salon colour technicians are professionally trained at L’Oreal market leaders in hair colour. If you want the latest hair colour effect our stylists will advise what is right for you. are trained specifically in the advanced Ionic hair straightening technique. The Ionic hair straightening treatment is a permanent straightening technique, widely acknowledged to avoid many of the hair condition problems normally associated with hair straightening, in fact, the Ionic hair straightening process involves hydrating the hair which improves the texture and condition of your hair after the treatment.