Generally, we need high-grade stone in decoration, and high-grade stone is a very important part of decoration. Many people are not familiar with the purchase of high-grade stone. Where will high-grade stone be used? This is what we must know. Now the quality of home decoration is getting higher and higher. Next, let's analyze: how to identify the appearance quality of high-grade stone? What are its functions and characteristics? Marble is a high-grade decorative material, so you must be careful when buying it, so as not to waste money. Identification of the appearance quality of marble can start with the following items: (1) Judging the pattern tone. In the case of sufficient light, put the selected plate and other marble plates to be purchased on the ground at the same time, and stand at a distance of 1.5m for careful visual inspection. It is required that the patterns and tones of the same batch of marble plates should be basically coordinated. (1) Determines the tone of the pattern. In the case of sufficient light, the selected plate and other marble plates to be purchased in the same batch will be laid flat on the ground at the same time, standing at a distance of 1.5m for careful visual inspection. It is required that the patterns and tones of the same batch of marble plates should be basically coordinated. (2) Check the surface defects. In the case of sufficient light, put the board flat on the ground, and observe the invisible defects from the marble board and think that there are no defects; Defects that can be seen when standing far away from the plate but not obvious there are no obvious defects; The obvious defect stands at the distance of 1. Is considered a defect. The specific observed defect is the warping of I plate; Whether there are cracks, sand holes, different color spots, stains and depressions on the surface of the plate. If it is judged that there are no above defects, the plate is excellent, and there are no defects such as missing edges and falling corners on the front of the plate; If the above defects are not obvious and there is no obvious lack of edges and corners, then this plate can be considered as a first-class product; If there are several defects that do not affect the use, and the front of the plate is only 1, the length is not more than 8mm, the width is not more than 3mm, and the missing edge or the length and width are not more than 3mm, the plate can be judged to be qualified. If the board is damaged during transportation, loading and unloading, it can be bonded (for broken boards) or repaired (for angular defects, pits or pits on the surface). However, there is no obvious trace on the front after adhesive repair, and the color should be close to the front color. (3) check the mark. The marking sequence of marble plates is: naming, classification, specification, size and grade; The naming order of standard marble slabs is: raw material place name, pattern and tone name, and marble (code M). Marble plates are divided into two categories: general plates (code N): square or rectangular plates; Special-shaped board (code S): It is a board with other shapes. Marble board has three grades: first-class product (code A), first-class product (code B) and qualified product (code C). The classification is based on the allowable deviation of specifications and dimensions, allowable limit tolerance of flatness, allowable limit tolerance of angle, appearance quality and mirror gloss. For example, the first-class plate with the general specification of 600mmX 400mmX 20mm produced by Fangshan White Marble in Beijing is named Fangshan White Marble and marked Fangshan White Marble (M)N 600X400X20BJC79. The manufacturer's name, trademark and mark shall be indicated when leaving the factory. So you can know the overall appearance quality of the plate by looking at the traces. When I didn't study this article before, I knew nothing about high-grade stone. I understand everything now. The above contents are some tips I collected, and I hope you can learn them. They are very useful. High-grade stone is often maintained, so its service life will be longer. In fact, it is about some sharing of high-grade stone materials, hoping to help you! Dear recognition is my greatest motivation!