First, the selection of high-quality Shandong white hemp should pay attention to three points: 1, the four corners of Shandong white hemp are right angles, no missing corners or fractures, the thickness of the stone has been. 2, Shandong white linen surface to be flat, no corrosion pit spots.

     3, Shandong white linen surface color difference as small as possible, the color can not be too dark.

      Second, the two main diseases and preventive measures of Shandong white hemp.

      In the process of using Shandong white hemp, some diseases can not be avoided, and the main Shandong white hemp diseases have rust spots and water spots. White hemp stone itself contains more iron elements, and it is easy to be oxidized after contact with the air, and then it is easy to cause rust pollution, so the key to prevention is to carry out useful appearance disposal of stone after processing to prevent iron from being oxidized. For water spots are caused by cement slurry, try to prevent stone and water contact.