How to identify toxic or harmful plastic packaging bags

We are using plastic packaging bags everyday. Can you identify toxic or harmful bags? Here I want to tell you 3 means as followings:

1. You can identify from method of identification of the senses. Non-toxic plastic bags have flexibility, feel lubrication, surface like wax; Toxic plastic color is cloudy, feel sticky.

2. It is shaking identification method. Forcibly seize plastic bags end with the hand shake, a ringing sound as non-toxic; Sounds boring may be toxic.

3. It is burning method of identification. Non-toxic polyethylene plastic bags of flammable, the flame is blue, the upper yellow, burning with paraffin taste; Polyvinyl chloride (PVC) plastic bags don’t toxic flammable, burning yellow, green fire outside, and have the irritating smell of hydrochloric acid.

Through these means you can identify the palstic bags such as stand up pouch with zipper.