the present invention relates to a process for making a laminate comprising paperboard and plastic film , and a non - aqueous adhesive layer between the paperboard and the plastic film , the process comprising the steps of : surface oxidation treatment of at least one side of the plastic film ; and extrusion laminating the plastic film to the paperboard ; wherein the non - aqueous adhesive layer is applied by extrusion between the plastic film and the paperboard to form the laminate , and wherein the process further comprises the step of printing inks onto the surface oxidation treated surface of the plastic film either before or after the extrusion lamination step ; and to a process for making a carton , whereby the carton is erected from a blank which is formed from the laminate .