Wear-resistant layer: big brands have more thickness, but it can't be detected manually. The obvious way is to hit it with something iron. If there are occasional sparks during the day, the thickness is absolutely enough. As for other wire brushes, they are not standard, because poor boards can withstand brushing for a while, unless they are particularly poor. And the number of revolutions marked on the product is useless at all. Sometimes the worse the brand is, the more irresponsible it is and the faster it is written.
Finishing layer: depending on the fineness, the good ones are generally imported with delicate patterns. This needs comparison.
The smell of the bottom material is related to the glue used. Cheap ones will have a feeling of' pricking the nose', and the strength is different, especially when the box is just opened. It's a very good board. When you open the box, you can smell it together. It has only a faint smell of wood, so the price of the glue used is much different. However, when you put the board in your nostrils, there will be obvious differences in smelling the smell of a single board. This method is much more realistic than the so-called environmental protection written on the merchants or products. In addition, it is the fineness of the substrate. The substrates of big brands are usually washed with Daya water, which is hard to say, but you can see some long sawdust from the cut surface and even the notch on the floor surface. )
Balance layer: different thicknesses need to be compared.