The general judgment of different kinds of plastics the most simple method is to see the first appearance and use, because use, each kind of plastic appearance is different, based on these two can be roughly determined may be what kinds of plastic, and then use the fire, to distinguish by the color of the flame, smoke color and odor concentration. The two steps can basically distinguish most of the common plastic. But this is a high demand for experience, and it may be difficult to master at once.

The burning characteristics of several kinds of plastic film: the biggest characteristic of PVC film is self extinguishing from fire. When burning with fire source, it will ignite and flame yellow. When burning, black smoke will be very heavy, and there will be a peculiar smell. If the fire source moves away, the flame will go out automatically and the burned part is black. The PET film after leaving the fire will not be extinguished, will continue burning, combustion would burned while contraction, also with a thick black smoke, burned part is white, there will be sour; PE and PP are difficult to distinguish, both burning flame is blue, PE burns with a very pale white smoke, will edge combustion while the molten drop PP smoke slightly thicker than PE, but no melt dripping phenomenon, both of which are like the smell of burning candles.