When looking at the choice of softwood flooring floor sanding surface is smooth, with or without bulging particles, cork particles are pure. See cork floor length is straight, the method is: Take the same four floors, shop in the glass, or more flat ground, assembled to see whether it seams.
Test plate bending strength, the method is to close the two diagonal floor to see if there is a crack in the curved surface, there is no quality products. Adhesive strength test. The small sample into the blisters and found that the sanding smooth surface into a toad skin, uneven surface, then this product is unqualified, no significant change in the quality product case of boiling water surface.