I.Observe with eyes
Non-toxic plastic bag is white, transparent or subtranslucent with even texture; while toxic plastic bag is colorful or white with bad transparency, turbid and there are uneven stretch and little granule on the surface.

II.Listen with ears
Shake the plastic bag vigorously with hands, if sound is crisp, it’s non-toxic plastic bag; if sound is tiny and muffled, it’s toxic plastic bag.

III.Touch with hands
Touch the surface of plastic bag with hands, if it is smooth, it’s non-toxic; tacky, unsmooth and waxy, it’s toxic.

IV.Smell with nose
Non-toxic plastic bag is tasteless; toxic one has offensive smell or abnormal smell.

V.Submerged in the water
Put the plastic bag in the water and press it to the bottom with hands. After a while, if it emerges from the water, it’s nontoxic; the submerged one is toxic plastic bag.

VI.Burning method
Non-toxic plastic bag is inflammable; top of flame is yellow; part of flame is cyan; something like wax tears drops when burning; there is a paraffin smell; toxic plastic bag is not inflammable; it will extinguished when leave the flame; top of the flame is yellow or black; bottom of the flame is green; there is filaments when softening and a sharp smell.