Leyton House Professional. Founded in 2007 and the brand behind the colour collection, Couture Silk. Formulated in Italy, for the specific needs of the hairdresser. We believe the key to our successful brand is through enhancing colour capabilities, encouraging education and creativity. Leyton House Professional, Couture Silk is an easy choice to make with our unique Silk Renewal Complex and SIMULTANEOUS LIFT & DEPOSIT. Fall in love with our Revolutionary Colouring System.