plastic zip lock bag: 1. non-toxic environmental protection, 2.easy to adhesion, 3.according to customer's request to print plastic self adhesive bag:1)material: PE, OPP, CPE,ect.2)It has a good seal, no smell3)It is widely used in food, medicine, clothing, household goods such as packaging, advertising and so on4)has a beautiful role in the protection, cheap.5)printing and colour can be done ...