The disclosure relates to a method to form a digital print on a substrate including a polymer material by bonding particles in powder form to the surface of the substrate. A method of forming a decorative wear resistant layer, the method including: providing a substrate comprising a thermoplastic material and a transparent layer comprising a thermoplastic material, providing a continuous print layer comprising particles on the substrate or on the transparent layer, printing a digital image comprising colour pigments on the print layer, and bonding the print layer with the colour pigments to the transparent layer and to the substrate with heat and pressure such that the digital image is located between the transparent layer and the substrate.