【Reason】 

The main cause of the whitening phenomenon lies in the soluble components within the hardened cement body, such as potassium, sodium, and calcium salts. When these components dissolve in water and come into contact with the surface of the hardened body, they will absorb carbon dioxide from the air, undergo a reaction to form compounds like carbonates, and deposit and adhere to the surface of the product. After drying, white contaminants are formed. 

2. During the grouting process, climatic conditions or improper construction methods can also cause the surface of the grouting agent to become whitish. Such situations include: 

Before tiling, the construction surface was too wet. 

② When mixing the slurry, too much water was added; 

③ The joint area is not filled properly, leaving gaps. 

④ When wiping and cleaning the brick surface after tiling, the sponge was too wet. 

⑤ Before the colloid was solidified, there were no protective measures in place, and it was exposed to external water or rain and got wet. 

After filling the gaps, rinse with water too early; 

⑦ The temperature during construction was too low, the humidity was too high, and there was no protection during rainy days.

【Handling Measures】 

Different causes of whitening, and different exterior wall products require different treatment measures. Generally, neutral cleaners or 3% concentration hydrochloric acid are used to clean the whitened areas. If it is due to the permeability of the wall causing whitening, it may take some time for the whitening to subside.

The exterior wall tiles have tile joints ranging from 5 to 10 mm in width during actual installation. The main reasons for this are: 

Decorative effect; 

2. There is an error in the product size. Without a seamless connection, it is difficult to lay the tiles, and the tiles cannot be sealed with sealant due to the close gray seam, which makes it prone to water leakage on the exterior wall. Therefore, the actual area of the exterior wall tiles laid on the wall includes the gray seam. That is what is called "containing the gray seam". After leaving the gray seam, the number of tiles per square meter of the wall surface can be calculated according to the following formula:

Formula for converting tile area to tile count:

[Note] 

K, Tile Width F, Tile Gap C, Tile Length D, Unit: MM

【Main Standard Specifications】 (MM) 

External wall tiles: 45 single pieces (45*45), 45 double pieces (95*45), 45 triple pieces (145*45), 45 quadruple pieces (195*45), small flat piece (108*60), small double piece hanging (200*60) 

Large-sized Dingtian bricks (227*60), 75-cent pieces (75*75), 95-cent pieces (95*95), Small-sized Dingtian bricks (145*22), Tunnel bricks (200*100) 

Floor tiles: 92-inch (92*92), 150-inch (142*142), 300-inch (300*300)

In addition to the above standard specifications, there are also many special annotations and tile sizes. Moreover, we can design and produce different-sized and surface tile products according to the customer's requirements.

1. Classified by the molding method: 

① Dry-molded ceramic tiles  ② Extruded ceramic tiles 

2. According to the tile manufacturing process: 

① Unglazed tiles  ② Glazed tiles  The glaze surface effects include (matte glaze, semi-matte glaze, glossy glaze) 

3. Classified by primary use: 

① Exterior wall tiles  ② Interior wall tiles  ③ Floor tiles in the room  ④ Floor tiles outside the room 

4. Classified by tile type (absorption rate) 

Ceramic tiles have an absorption rate of ≤ 0.5% 

② Porcelain tiles have an absorption rate of 0.5 to 3%. 

③ Fine炻 tiles have an absorption rate of 3 to 6 percent. 

④ Porcelain tiles have an absorption rate of 6 to 10 percent. 

⑤ Clay tiles  Water absorption rate ≥ 10%

When cleaning metal glazed tiles, try to use clean water for the cleaning process. 

② If it is difficult to clean, dilute hydrochloric acid (HCL) can be used for cleaning. However, the concentration of HCL should not exceed 3%. After cleaning with dilute HCL, please immediately use clean water to thoroughly wash away the dilute HCL (if the dilute HCL remains on the tile surface, it will damage the surface of the metal-glazed tiles when dried, and the luster will weaken). 

③ Metal glaze tiles should not be cleaned with strong acids (such as HCL with a concentration exceeding 3%, or washing stone water, etc.) or strong alkaline solutions. Strong acids or strong alkalis can also damage the metal glaze layer, reducing the luster of the metal glaze. 

④ Absolutely, do not use organic solvents (such as gasoline, thinner, etc.) for cleaning. These organic solvents will cause the luster of the metal glaze to disappear. 

⑤ When using tile grouting materials for exterior wall construction, if they contain materials such as diamond sand or silica sand, they may scratch the surface of the shiny glazed metal glaze products. It is recommended to use softer tools such as sponge trowels for the application process to avoid scratching the brick surface and affecting the surface effect. For the cleaning tools used to clean metal glazed tiles, please select soft materials (such as sponges) for gentle wiping. Do not use hard items (such as steel wire brushes) to forcefully wipe the metal glazed tiles to prevent scratches on the surface and thus affecting the metallic luster.

【The advantage lies in the fact that these performance parameters can be tested using detection equipment.】 

① Absorption rate; 

②  Degree of damage; 

③ Chemical corrosion resistance; 

④ Frost resistance; 

⑤ Resistance to pollution; 

⑥ Stability of dimensions;

【You can carefully observe the advantages in the following aspects with the naked eye.】 

Color difference within the same color product; 

② The differences in luster between different products, and even the differences in luster within the same product; 

③ By striking and listening to the sound, the clearer the sound is, the higher the degree of porcelainization of the ceramic is. 

④ Product size and deformation degree; 

⑤ Does the decorative effect on the surface of the ceramic tiles give the impression of being luxurious, natural, or comfortable?