When buying plywood composite panels , or wooden plates  the first you should do is to look out for the appearance of this wood . often to say that bad and fault board have burr and sharp on the surface, while the premier boards such plywood of daban is strictly processed by baking sheet of high quality surface neat and smooth, and inter-layer symmetry is close-grained, board face level off, the luster is consistent, not bending deformation, no fault decayed, wood grain Angle is small, no resin marks Vitiligo and cellular eyes, and dot on surface is very small and less.

Second point is that to see wood moisture content, when lumber moisture content is higher than the average level of environment balanced moisture content, plywood shall go to shrinkage, otherwise it will be of expansion of and deformation so the damage and broke of the main reason is the wood and plywood ‘s moisture content is too high or too low Finally, don’t only pursue cheap, when buy sell material is usually manufactured and the material of formaldehyde exceeds bid badly, should go to regular markets buy, had better buy a brand of material To open check for the first time after receipt of the wood be replace, or presence of be affected with damp be affected with damp.