The identification of marble
The identification of marble:
Choose a good grade, according to the specification size allowable deviation, flatness and angle allowable tolerances, as well as the appearance quality, surface finish and other indicators, marble sheet is divided into excellent products, first-class products and qualified products three grades; The grading and identification of marble plates is mainly identified by the testing of instruments and measuring tools.
Check appearance quality The appearance of marble plates of different grades is different. Because marble is naturally formed, defects are unavoidable. At the same time processing equipment and measuring the pros and cons of the plate is also the cause of defects. Some plate body is not plump (warping or depression), the board has defects (cracks, sand holes, color spots, etc.), the size of the board (such as lack of edges and corners, the plate is not positive).
According to national standards, all grades of marble plates are allowed to have a certain defect, but the excellent product is not so obvious bale.
Choose pattern tones Marble plate colorful, tonal diversity, no same pattern, this is the precious charm of marble plate.
Tonal basic consistency, small color difference, beautiful pattern is the specific performance of fine varieties, otherwise it will seriously affect the decorative effect.
Measuring Surface Gloss The surface gloss of marble plate will greatly affect the decorative effect. Generally speaking, the polished surface of high quality marble plate should have mirror-like luster, which can clearly reflect the scenery. However, different quality of marble due to different chemical composition, even the same grade of products, its gloss difference will be very large. Of course, the same material different levels of the plate surface gloss will also have a certain difference. In addition, the marble plate strength, water absorption rate is also an important indicator of the quality of marble.