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A well-sealed can can effectively isolate oxygen and moisture, preventing biscuits from oxidation and deterioration and moisture absorption and deliquescence. According to relevant research data, if stored in a dry, sealed tinplate can, the shelf life of biscuits can be extended to 12 months or even longer.

Aerosol cans must withstand internal gas pressure, and the strength of the material is crucial. The basis of tinplate sheet is steel, which itself has high strength and rigidity and can withstand large external impacts and internal pressure.

Unlike iron and steel, tin will not rust in the air. This is because tin can form a dense protective film of tin oxide (SnO2) on the surface. This oxide film has good stability and corrosion resistance, and can effectively prevent air and moisture from further corroding the tin material.

Authoritative organizations such as the U.S. Food and Drug Administration (FDA) and the European Food Safety Authority (EFSA) have strictly regulated and certified the food contact materials of tin boxes to ensure that they meet food safety standards.

The impact of the use of aerosol tin cans on the environment is one of the main reasons for many countries to implement bans. The propellants and packaging materials in aerosol tin cans will pollute the atmosphere, soil and water sources, seriously threatening the ecological environment.