Zip Bag transparent no PrintClear Zip Bags without print. This Zip Bag protects against flour and dust. Nothing goes missing by the quick lock. This Zip bags, or also known as Zipper bags, are suitable for storage and package of food products. This bags are made of PE LD (Low Density), or named as LDPE. Fundamental is PE LD more flexible as PE HD (High densitiy) or PP (Polypropylen). The tensile strength at 20C is nearly 10 N mm.