Select the white marble rock grade: according to the allowable deviation of the all granite and marble specification size,the allowable tolerance of the flatness and angle,as well as the appearance quality,surface finish and other indicators,the marble and granite supply sheet is divided into three grades: superior grade, first grade and qualified grade; grade of marble properties board Identification is mainly identified by the detection of instruments and gauges.
Check the appearance quality: the appearance of different grades of marble plates is different. Because marble is naturally formed, defects are inevitable. At the same time, the advantages and disadvantages of processing equipment and measuring tools are also the cause of sheet defects. Some plates are not full (warped or sunken), and the plates are defective (cracks, blisters, stains, etc.), and the plate specifications are different (such as lack of edges and corners, plate body is not correct). According to national standards, marble slabs of all grades are allowed to have certain defects, but the superior products are not so obvious.
Choosing the pattern color: The white marble rock is colorful, the color is varied, and the patterns are not the same. This is the precious charm of the all granite and marble. The color tone is basically the same, the color difference is small, and the beautiful pattern is the specific performance of the excellent variety, otherwise it will seriously affect the decorative effect.
Detecting surface gloss: The gloss of the marble and granite supply surface will greatly affect the decorative effect. In general, the polished surface of high-quality marble plates should have a mirror-like luster that clearly reflects the scene. However, due to the different chemical composition of different quality marbles, even the same grade of products, the difference in gloss will be great. Of course, there will be some differences in the gloss of the surface of the board between different grades of the same material. In addition, the strength and water absorption of marble sheets are also important indicators for evaluating the quality of marble.
Natural white marble rock is made of natural stone, so its quality depends on the quality of the all granite and marble block and on the other hand,it is also related to the marble and granite supply processing.