Floor, which refers to the surface layer of a building or floor. Made of wood or other materials. There are many classifications of flooring, including solid wood flooring, reinforced composite wood flooring, three-layer solid wood composite flooring, bamboo wood flooring, anti-corrosion flooring, cork flooring, and currently popular multi-layer solid wood composite flooring; Classified by purpose, there are: household, commercial, anti-static flooring, outdoor flooring, stage dance flooring, sports arena flooring, track and field flooring, etc; Classified by environmental protection level, there are E0 level flooring, E1 level flooring, F4 level flooring, JAS star standard F4 star flooring, and so on.

Solid wood flooring grades: National classification: Excellent, First Class, and Qualified. Excellent products have high quality.

Environmental protection level: The country has not established corresponding standards for classification.

Wear resistance grade: superior productsolid wood floorThe wear resistance index of the painted board surface is ≤ 0.08g/100r; First grade product ≤ 0.10g/100r; Qualified product ≤ 0.15g/100r.

Paint film hardness: It reflects the strength of the paint film on the surface of solid wood flooring, and is closely related to the material of the solid wood flooring and the thickness and material of the paint film itself. The national standard stipulates that the hardness index of the paint film on high-quality solid wood flooring is 2H level; First grade and qualified products ≥ H.

Paint adhesion: It reflects the adhesion strength of paint to solid wood flooring. If this indicator is not qualified, it also indicates that the paint quality of the flooring is poor, which may cause paint cracking or even peeling during use, and also affect the service life of the flooring. The national standard stipulates that the adhesion index of high-quality solid wood flooring paint film is level 0-1; First grade product ≤ Level 2; Qualified products ≤ Level 3

Moisture content index: refers to the moisture content of solid wood flooring in the sales area without being unpacked or just removed from packaging. Failure to meet this indicator will result in deformation, warping, arching, or separation of the floor during use, affecting its appearance and performance. The national standard stipulates that the moisture content index of solid wood flooring is 7% to the equilibrium moisture content at the sales location.

Color difference: This is crucial, and many disputes over solid wood lie in it. It is unrealistic for people to demand consistent natural color differences in solid wood flooring. Solid wood flooring must have color differences, which are natural and inevitable. This is determined by natural properties. Therefore, when the country formulates relevant standards, there are no requirements for color differences.