1.packing film are good sealing 2.long time for expire time 3.easy for bring. Parameters of packing film:the PTP is printing the world and picture on the PTP foil and coated with the OP and VC glue.Use for the blister packaging,along with the PVC packaging, just like tablet, capsule.The advantage is good sealing and long time for expire time and easy for bring. packing film,PVC, Packing Material