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1. The barrier film outer packaging of food plastic bags should be marked in Chinese, with the name of the factory, address, and product name, and the words "for food" should be clearly indicated. The product inspection certificate is attached after the product leaves the factory.
2. Food plastic packaging bags are odorless when they leave the factory. They cannot be used as food packaging bags if they have special odors.
3. Colored plastic packaging bags (dark red or black currently used in the market) cannot be used for food packaging. Because this type of plastic packaging bags are often made of recycled plastic.
4. Try to choose materials that are not coated or plated. In modern packaging design, in order to make the packaging more beautiful and corrosion-resistant, a large number of additional coating materials are used. This not only brings difficulties to the recycling and reuse of materials after the product is scrapped, but most of the coatings themselves are also toxic.