The fading factor of natural marble is mainly used for the decoration of outdoor exterior walls. After 2 to 3 years of wind and rain, sulfur dioxide in the air reacts with dolomite to form gypsum, causing the marble surface to fade like blur. Marble itself will not fade. Marble is mainly composed of calcite, dolomite, limestone and serpentine. Its main component is calcium carbonate, which accounts for about 50% to 95%. The carbonate [CO3] ion in calcium carbonate is relatively active, and it is easy to interact with acidic sulfur dioxide in the air, forming turbid particles attached to the surface of the marble, making the marble look blurred, similar to discoloration.
Basically, natural marble belongs to the Class A standard of building materials and decoration, and can be used for indoor and outdoor decoration. The native hardness of marble is not as high as that of granite. Marble is used for outdoor decoration, and it is easy to be exposed to wind and sun. Rainwater reacts easily with calcium carbonate. The formation of gypsum or osmotic anti-alkali, rust spots and other undesirable phenomena. How to solve the fading problem of natural marble? Generally speaking, only the marble on the exterior wall has the problem of fading. To solve the problem of fading, you only need to re-polish the stone. Compared with ceramic tiles, the biggest advantage of marble is that it can be refurbished repeatedly without affecting the brightness and beauty of the board surface.
Generally, marble decoration is mostly used indoors. Because indoor marble basically does not need to be exposed to wind and rain, its surface crystals can protect the marble from weathering for a long time, and can also block the penetration of moisture and stains. The effect of marble decoration can not only satisfy the pursuit of high-end atmosphere and grade, but also enhance the satisfaction brought by decoration.