The quality of packaging bags produced by plastic packaging factories is sometimes uneven. We must master certain identification methods when purchasing to ensure that we can buy plastic packaging bags of good quality. Through the methods of eye observation, nose sniffing, ear listening, etc. during purchase, the quality of the packaging bag can be effectively identified.
1. Observe with eyes. Non-toxic plastic bags are white, bright or slightly transparent, and the texture is uniform; toxic plastic bags are colorful or white, but the transparency is poor, more turbid, the plastic surface is stretched unevenly, and there are small particles.
2. Listen with your ears. When shaking the plastic bag with your hand, the crisp sound was declared as a non-toxic plastic bag; the small and dull noise was the toxic plastic bag.
3. Touch by hand. Touching the surface of the plastic packaging bag by hand is very lubricating and non-toxic; sticky, astringent, and waxy are toxic.
4. Smell with your nose. Non-toxic plastic bags are odorless; those that affect the odor or taste are not toxic.
5. Submerged experiment method. Put the plastic bag in the water, press it to the bottom of the water by hand, wait a moment, the non-toxic plastic packaging bag will appear on the surface, and the toxic plastic packaging bag will sink under the water.