Do you know the difference between PVC foam board and pvc co-extruded board？

Описание: From surface,you can see Pvc co-extruded board is more glossy than PVC foam board. Then we check surface hardness,this one is PVC foam board than surface hardness is 50D. This one is PVC co-extruded board surface hardness is 75D. As PVC co-extruded board is three layer multi board, core color and surface color be different.
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