1. The PVC[PVC?:PVC sample cutting machine] Crust Foam Board[Foam Board?:foam board] is negative: smooth surface, no mechanical pattern (not obvious), no color, no stains, no pits, no, no hole marks
2.the sheet side edges: cut flat, fine pores, no, no foam, no bee holes, can not afford to powder, do not jump the mouth
3. The thickness of PVC Crust Foam Board: caliper stand up board, access to seamless, left-right measurement, thickness uniformity (standard ± 0.2MM), uniform length and width (standard ± 2MM)
4. The weight: length CM * CM * W = weight density of the thickness of MM *
5. The PVC Crust Foam Board density: weight / (length width CM * CM * Thickness MM) = density
