Process for surface decoration

A process for modifying a plastic surface comprised on a product part, the process comprising:

• mounting a die into a heating printing machine;
• heating the die;
• bringing the die in contact with the plastic surface of the product part to modify the plastic surface,
• the die being made of a silicone rubber material and the die has a surface with a surface structure comprising embossed areas, a mean roughness depth value of the surface of the die is of less than about 250 μm, as measured according to DIN EN ISO 4287.