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Spray painting can not only effectively isolate the contact between oxygen and moisture in the air and the surface of tinplate sheet, but also prevent acidic substances or other food ingredients from corroding metal materials to a certain extent.

The metal material of the three-piece metal candy tins body is tinplate. The metal packaging material for the top and bottom covers can be tinplate, chrome-plated iron, and aluminum. Aluminum will not rust, while tinplate and chrome will rust when exposed to wet environments.

Nowadays, tin boxes and tin cans are used in the packaging of many products, especially in fast-moving and high-consumption product industries such as the food industry, pharmaceutical industry, and cosmetics industry. In addition, there are also some industrial and daily necessities that also use tin boxes. Iron cans, such as candle cans, ice buckets, etc.