1. By eye observation, the nontoxic plastic bag is white, transparent or slightly transparent and even in texture; Toxic plastic bags are colored or white, but the transparency is poor and turbid, and the plastic surface is stretched unevenly with small particles.

second, listen with your ears, and when you shake the plastic bag with your hands, it makes a crisp sound indicating that it is a non-toxic plastic bag; And the sound is small and stuffy is the toxic plastic bag.

3. Touch the surface of the plastic packaging bag by hand, which is smooth and non-toxic; Sticky, astringent and waxy are toxic. Fourth, smell with your nose, non-toxic plastic packaging bags are tasteless; It is poisonous to have a pungent smell or an abnormal taste.

5. Submerged test method: put the plastic bag into the water, press it to the bottom of the water by hand, and wait for a moment. The non-toxic plastic bag emerges from the water, and the toxic plastic bag sinks to the bottom.

6. combustion method: the nontoxic plastic bag is flammable, the flame tip is yellow, and the part is blue. When burning, it drips like a candle tear and smells like paraffin. Toxic plastic bags are not easy to burn, and extinguish immediately after leaving the fire. The tip of the flame is yellow and the bottom is green, so it can be softened and drawn.