Rub with your hands. If the colored plastic bag does not float in the water, it cannot hold food. Plastic bags that can't hold food feel particles and are relatively stagnant.Recently, during interviews in major supermarkets and vegetable markets in Shanghai, the editor found that merchants used colored plastic bags when packaging various types of food for consumers, and most of them were white plastic bags.
This substance sticks to the food and is difficult to clean. The black, red, green, and yellow plastic bags that cannot be used for food can also not be used for fruits and vegetables. The reason is that most of the non-edible plastic bags are made of waste plastics and dyes. Because colored plastic bags are exposed to oil and heat, the pigments can easily bleed out and contaminate food, and white plastic bags are not safe. When buying plastic bags, check to see if the words 'for food' are marked on the outer packaging.
So in our daily life, are the plastic bags used for packaging and holding food hygienic and safe? According to Professor Ren Fazheng from the School of Nutritional Foods of China Agricultural University, colored plastic bags cannot hold cooked foods, especially oily and hot foods.. Rub the Wholesale Black Pe Stretch Film Manufacturer plastic bag gently with your hands, and the plastic bag that can hold food has a fine and smooth feeling. So, how do we distinguish such plastic bags? Professor Ren told the author that there are mainly the following identification methods: look at the surface of the packaging.
The one that floats up easily can hold food. Soak the plastic bag in water and press it to the bottom of the water. In addition, the plastic bags labeled 'food use' should also be used in methods, otherwise it will bring negative results. Soak with water. They contain many harmful substances such as lead and arsenic
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