Dear buyers, regarding the quality classification of EVA materials, we will introduce here preliminarily, EVA materials are divided into three grades for A grade B grade C. The way to distinguish between grade A material is new material without old material and recycled material is to look at the color, white enough white black enough black enough; second look at the stomata, because the addition of foam pores of the regenerative material will be relatively rough compared to A material; three touches with the finger to press hard to see if the rebound effect is good or not. Ingredient A has a taste, but it belongs to the kind that floats on the surface, and the smell can basically dissipate when it is opened and placed in a ventilated place for a period of time. Can be exported to the European Union over the environmental protection SGS certification, widely used in children's toys, electronics, machinery.

Ingredient B also has a taste, but it also belongs to the same open package that floats on the surface and is placed in a ventilated place for a period of time, and the taste can basically be dissipated, but compared to material A, material B has added some recycled material, so the color is not as white as material A. The intuitive difference between A and B is the color and density. The C material is a fully recycled material, which is the so-called recycled material. It is intuitive to distinguish between color and smell.