According to the national standard of marble radiation is divided into A.B.C board, in general, a class is in line with national standards, very little harm to the human body. The radiation of granite is bigger, marble is smaller, it is necessary to pay attention to before buying. In addition, some red marble radiation is relatively large, if happen to like this marble, we must look up the level of it. In addition, there are some C board, its main feature is in the white pattern with dark red pattern, in the stone market circulation! You know C in radiation greatly, generally only in remote engineering at home and few people tread, long words, people get leukemia, hemophilia and so on all kinds of terrible diseases. So, in the purchase of marble is necessary before the first survey clear before a decision.
In addition, marble plate strength, water absorption is also an important indicator to evaluate the quality of marble.
Detection of surface gloss: marble board surface gloss level will greatly affect the decorative effect. General quality polishing marble plate surface shall have a mirror like luster, can clearly reflect the scenery. However, because of the different chemical composition of different quality marble, even with the same level of products, the difference in gloss will be great. Of course, the same material between different grades of the board surface gloss will have some differences.
Select the pattern color: marble plate color spot LAN, color diversity, patterns are not the same, this is the marble plate of the precious charm. The tone is basically the same, the color difference is small, the pattern is beautiful is the specific performance of good varieties, otherwise it will seriously affect the decorative effect.
1 selected grade: according to the size of the allowed deviation, flatness and angle tolerance, and appearance quality, surface roughness index, the marble plate is divided into superior products, first-class quality and grade three; the marble plate classification, mainly through the detection of differential measuring instruments, to identify the.2 check the appearance quality: different grades of marble plate appearance is different. Because marble is naturally formed, the defect is inevitable. At the same time, the advantages and disadvantages of processing equipment and measuring tools is also the cause of the plate defects. Some plate plate not plump (warping or depression), plate defects (cracks, blisters, stains, etc.) plate specifications (such as a board body is not the lack of edges, etc.). In accordance with national standards, the level of marble plates are allowed to have some defects, but not so obvious grade.
