The characteristics of aluminum foil packaging aluminum foil is made of electrolytic aluminum with a purity of 99.0%-99.7%. After repeated calendering, this soft metal film is not only moisture-proof, airtight, and light-shielding, but also has the advantages of fragrance preservation, non-toxicity and tastelessness. The advantage of this is that any other existing packaging materials are unmatched. This is the practical side of aluminum foil. Its gorgeous side is reflected in its elegant silver-white luster. People can make full use of their imagination to print beautiful patterns and patterns with various characteristics and colorful colors. Because of its super practicality and variety, aluminum foil packaging is increasingly favored by people, and the market space is unlimited. Advantages of aluminum foil: aluminum foil has shiny metallic luster, strong decorative; non-toxic, odorless, odorless; relatively light weight, specific gravity is only one-third of iron, copper, etc., extensible, thin, unit area The weight is small; the light-shielding property is good, the light-reflecting rate is up to 95%; the protection is strong, the package is not easily attacked by bacteria, fungi and insects; the high temperature and low temperature state are stable, and the temperature does not shrink and deform when the temperature is -73 to 371 °C; It has excellent barrier properties, moisture-proof, air-tight and fragrance-proof, which can prevent moisture absorption, oxidation and volatilization of the contents of the package, and its moisture resistance and oxygen barrier. Aluminum foil is easy to process and can be compounded with various plastic films and papers. Disadvantages of aluminum foil: low strength, easy to tear, can not be used alone for packaging products. It is easy to break when folded, produces holes, and is not resistant to acid and alkali.