1. There are differences between the front and back, the front is smooth and smooth, the surface of the wood grain is clear, not rough, smooth and no sense of lag is good.
2. There should be no defects such as damage, bruises, hard injuries, or gangrene.
3. No degumming phenomenon.
4. Some plywood is made by affixing two different lines of veneer together. Therefore, attention should be paid to the plywood patchwork where there is no unevenness.
5. Plywood should be selected without bulking. If the hand taps on various parts of the plywood, the sound is brittle, which proves that the quality is good. If the sound is boring, it indicates that the plywood has been scattered.