The manufacturer of tons of bags uses the immersion test method to put the plastic bag into the water, press it to the end by hand, wait for a moment, the good plastic bag comes out of the water, and the toxic plastic bag comes out of the water

You can also listen by ear. When the ton bag is shaken by hand, it will make a crisp sound, indicating that it is a good plastic bag, and the sound is small and stuffy is a bad plastic bag.

According to the naked eye, the good ton bag is white, transparent or slightly transparent, the texture is relatively uniform, the toxic plastic bag is colored or white, but the transparency is poor and cloudy, the plastic surface is stretched uneven, and there are small particles.

Smell with your nose. Good tonnage bags are odorless. Ton bag manufacturers remind you, but if there is a pungent smell or abnormal taste is not good. And the combustion method. Good plastic bags are flammable. The tip of the flame will be yellow and some parts will be cyan. They drip like candle tears as they burn, with a smell of paraffin wax.