according to the classification and terminology of ceramic tiles and sanitary ceramics, ceramic mosaic belongs to the category of ceramic tiles. Its physical properties, such as water absorption, shall be less than 0.5%, and its frost resistance, failure strength, fracture modulus, thermal shock resistance, chemical corrosion resistance, wear resistance, impact resistance, friction coefficient, acid and alkali resistance, thermal expansion coefficient, etc. shall meet the technical requirements of ceramic tiles in GB / t41001-1999 dry pressed ceramic tiles, However, ceramic mosaic has its own uniqueness. Because it is composed of several small tiles, not only the appearance and deformation of each small tile reach & ldquo; Ceramic brocade brick & rdquo; According to the requirements of industry standards, the spacing of each small brick spliced into a joint at the same time, that is, the line of each joint shall be uniform, so as to achieve satisfactory paving effect. In addition, there are two kinds of paving methods: paper joint reverse paving and mesh joint positive paving