Analysis: Several steps to identify waste plastics

General identification of waste plastics has the following steps:

1, see the color;

2, see the brightness (transparent material can be removed this step);

3, feel (feeling, smoothness);

4. Igniting (whether the flame color is smoke or not, whether it contains burning from the fire or not burning at all);

5, smell smell (all kinds of plastic taste is not the same, including flame retardants, etc.)