It has splendid silvery white luster,and the pinhole degree is nearly zero,and it has high obstruction,heat insulation and air 
tightness,and has the functions to obstruct moist, all kinds of gases(including aromasubstances) and lights,and can be 
used to resist moist, bacteria and retain fragrant. It also has outstanding mechanical performance, antl-corrosion,and is 
appropriate for all kinds of weather conditions and environments, and is suitable to be packing at high speed automatically