MARKING METHOD ONTO LAMINATED FILM MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a marking method such that the marking endures the treatment process thereafter, e.g. sterilization of a package, and brings about an optically appropriate result in particular a marking means on the upper face of a laminated film for a blister pack. SOLUTION: The marking method onto the laminated film comprising a process to ablate the laminated film, wherein the laminated film has at least one plastic layer attached and covered on a metal layer by attaching and covering layer, each of the plastic layer and the metal layer has a first face coming into contact with the contact layer, and the laser ablates to the depth between the first face of the plastic layer and the first face of the metal layer so that the metal layer is not exposed to the atmosphere.