Misunderstanding of food packaging materials

Many plastic packaging problems, glass, ceramics, metal utensils can be used with confidence? “This is also a major misconception that people understand food packaging.” Yang Fuxin, a professor at Shanghai Ocean University’s School of Food, tells us that the “combination index” of different packaging materials and foods is different, and it is necessary to know the temperament of each food packaging.

Metal packaging materials are one of the traditional packaging materials, but lead and arsenic in metals and solders can easily infiltrate into foods and cause contaminated foods. Therefore, it is generally necessary to coat the inner and outer walls of metal containers, but the chemical contaminants in the coatings will also migrate during processing and storage, and endanger food safety.

Glass as a packaging material, good barrier properties, light and transparent, chemical stability, easy molding. However, the glass is resistant to acids and alkalis. If you use strong alkaline foods, glassware should not be used.

Ceramic packaging containers can maintain the flavor of food, but the heavy metal elements such as lead, cadmium, antimony and other metal oxides and salts in the glaze layer on the glazed ceramic surface also have the possibility of dissolution. When using ceramic tableware, it is best to choose underglaze color, away from the glaze color, or directly use white porcelain without color.

Wooden food packaging containers have to be treated or coated on the surface, and the color pigments may also contain heavy metal salts. The now-popular density fiberboard moon cakes and tea packaging boxes are worrying because they contain a large amount of free formaldehyde and other harmful volatile substances.

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