Interior wall tiles are a type of ceramic tile, primarily used for interior wall decoration. They consist of three parts: the body, the underglaze layer, and the top glaze layer. The water absorption rate of the body is generally around 10-18%. The weight of the underglaze applied is 40-60 grams, while the top glaze is 90-160 grams. In general, the higher the firing temperature, the greater the weight of the top glaze, resulting in better brightness and a smoother surface of the tile. Of course, the quality of the glaze material also has a significant impact.

Inspection Standards: 1. For wall tiles, it is not permitted to have hollow spots in any area. Hollow spots at the edges of tiles are allowed, but the number of hollow spots at the edges within a single room should not exceed three. You can use this standard to inspect the wall tiles in our indoor kitchen and bathroom.

2. The standard for verticality is that the facade of the tiles must be kept within 3mm of verticality. Otherwise, it is not qualified.

3. The standard requirement for flatness is that the tiles must not exceed a flatness error of 2mm. Additionally, the height difference between adjacent tiles should not exceed 0.5mm. Tiles with any exceeding errors are considered不合格, and we can request their removal and re-laying.

4. Tile joint levelness, whether horizontal or vertical, must not exceed 0.5mm. In fact, any deviation over 0.5mm is visible to the naked eye. Additionally, measure the tile joint's vertical and horizontal levelness before applying the grout, as the grout can cover up imperfections, making it difficult for us to measure later.