however, in the IMD process, the polymeric film was usually printed with a pattern on the film surface and coated with layers of chemicals for protection, adhesion, or de-molding. this indicated that it is more difficult to obtain good production if the decorated film is not suitably fitted into the mold for molding.further,under these conditions, the thermoforming of the film becomes even more critical.both the pattern quality and thickness uniformity of the formed films are more sensitive to the processing parameters of thermoforming.