Identification of quality of recycled plastic pellets

1, see the surface brightness, is transparent.

2, to see the whiteness, not only look at the surface, mainly to see the whiteness of the cut surface, whiteness determines everything.

3, see the hardness, with teeth bite to know, good material is hard, too soft to explain impure.

4, to see if it is submerged, is to look at the amount of stone powder, the general renewable materials in more or less there will be stone powder, because the raw material of renewable materials is not very pure, if you do not add stone powder, generally do not sink.