Product advantages: 1. Light weight, with metallic luster and good light-proof performance, high reflection ability to heat and light, metallic luster and reflection ability can improve the brightness of printing colors; 2. Good insulation, strong protection, no air and water vapor, prevent the contents from absorbing moisture and vaporization, and not easy to be invaded by bacteria and insects; 3. Good shape stability, not affected by temperature changes; 4. It cannot be stressed, has no sealability, pinholes and wrinkles, etc., so it is not used alone under normal circumstances. It is usually processed into composite materials with paper and plastic film, which overcomes the shortcomings of no sealability and isolation The advantages of sex have also been fully utilized.