can be distinguished by some methods.
1.Check whether there is QS identification and number on the products
;it also depends on whether the surface of the product is smooth and clean and whether there are impurities or black spots. Generally speaking, transparent plastic products are made of pure polypropylene (PP), with a high safety factor; Brightly colored products may use waste plastics, so the darker the color, the more unsafe it is.
2.To touch the strength of the products. The products produced by using recycled waste or adding a large amount of industrial grade calcium carbonate and talc powder is generally very poor in strength and will break when torn gently.
3.To smell whether the degradable products have peculiar smell. The qualified degradable products have no peculiar smell.