Marble means in Dali in yunnan province, white with black decorative pattern of limestone, profile can form a natural ink painting landscape painting, ancient often choose have shape of decorative pattern of marble used to make screen or Mosaic.
Later, the name of marble gradually developed to refer to the limestone that had all kinds of colors, used for building decoration materials. White marble is commonly known as the white marble, but the white marble that makes statues in the west is also called marble. As for the name of marble, there is a saying that the marble quality of China's marble is the best. Therefore, its name.
Marble is generally soft in nature, which is relative to granite. In interior decoration, TV countertop, windowsill, indoor ground is suitable to use marble. Marble is a commodity name, not a rock definition. Marble is natural building decorates stone material a large class, commonly refer to have adornment function, can be processed into building stone or handicraft have metamorphic or unspoiled carbonate rock class. It is named after the brilliant color and pattern of stone in daguan mountain in Dali city, yunnan province, China. Marble is referred to as marble , limestone, dolomite, as well as carbonate rock and marble formed by different alteration.
Choose good grades: according to the size allowed the allowed tolerance deviation, flatness and Angle, and appearance quality, surface finish and other indicators, marble plate is divided into classy article, first-rate nonconforming product and three levels; The grading and identification of marble plates are mainly identified by means of instruments and measuring instruments.
Check appearance quality
The appearance of the marble plates varies from grade to grade. Because marble is formed naturally, defects are inevitable. At the same time processing equipment and measuring tools are also the cause of the defects. Some plank body is not plump (warp or sag), board body has defect (crack, sand eye, color spot etc.), board body specification is different (if lack of edge, plank is not right) wait. According to the national standard, all grades of marble are allowed to have certain defects, but the superior products are not so obvious.
Marble plank colour is colourful, tonal diversity, pattern is not identical, this is the glamour that marble plank is valuable. Tonal basically consistent, chromatic aberration, decorative pattern beautiful is the concrete expression of fine breed, otherwise can seriously affect adornment effect.
Detect surface gloss
The high and low gloss of the marble plate will greatly affect the decoration effect. Generally speaking, the polished surface of high quality marble should have the same luster as a mirror, and can clearly reflect the scene. But different qualities of marble are different in chemical composition, even in the same grade of products, their gloss differences can be very large. Of course, the surface gloss of the plates with different levels of the same material will also be different. In addition, the strength and water absorption rate of marble slab is an important index to evaluate marble quality.