... side gusset, three-side sealed, sealed in the back corner, sealed in the back center, etc.4. Printing: Good quality, high speed printing ... to national call. In order to integrate with the international quality system, the company strictly controls and improves packaging materials, ... heat-sealed, heat-cut, cold-cut, sealed-in the-middle, three-side-sealed, with handle or hanger hole, etc.6. Cosmetic ...