The high quality core board has the following features:
1. Standard plate thickness 1.75cm-1.80cm, side mark organic printed trademark and production date.
2. The core is made of roasted dried wood, willow wood and poplar wood.
3. The surface is smooth and polished without dents.
4. Saw along the diagonal 30cm × 30cm, the gap is 0.5-1.0mm, the wood is consistent; smell with the nose, no smell (formaldehyde).
5. Pick up a corner of the large core board by hand, shake it up and down, listen to the ear, and there is no sound in the board.
6. Pick up the large core board and tap it gently with a wooden stick or a hammer.
Ningbo Yunsheng Elastic Components Co.,Ltd , https://www.yunshengsprings.com