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

Inspection Standards: 1. For wall tiles, it is not permitted to have hollow spots in the areas. Hollow spots are allowed at the edges of the tiles, but no more than three such spots are allowed in a single room. You can use this standard to inspect the wall tiles in our indoor kitchen and bathroom.

2. The standard for verticality is that the verticality of the tile's face must be controlled within 3mm. Otherwise, it is不合格.

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

4. Tiling joints must not exceed a tolerance of 0.5mm in either horizontal or vertical alignment. In fact, any deviation over 0.5mm is easily noticeable to the naked eye. Additionally, measure the vertical and horizontal alignment of tile joints prior to filling, as the fill can obscure the joints, making it difficult to measure later on.