1. The wood grain of good quality plywood is relatively clear, and it is smooth and flat to touch, and there will be no cracking and bulging phenomenon,

2. The moisture content of the plate is very important, if the water content is too high, then the plate is prone to cracking and deformation, 

3. The core of plywood is an important factor to determine the quality of plywood, plywood joint is also very important, unprofessional joint way can appear uneven phenomenon.