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9 reasons to cause tile color difference, not just quality problems.

- May 05, 2018 -

How to determine whether there is color difference for tiles? The national standard GB/T4100-2016 “Ceramic Tiles” stipulates: Place a number of tiles on the observation board to a size of 3 square meters, and the inspectors shall stand on a three-meter-long basis for visual observation. If there is no obvious color difference between the tiles, products are qualified; if there are color differences, then not qualified.


Discoloration and color difference after tile paving may be caused by high water absorption. However, in addition to quality factors, improper operation and maintenance during paving may also cause discoloration.


Construction Process:

1. Tiles are not soaked in water

If the porcelain tiles are paved before being soaked or without sufficient water soak, they may absorb the moisture in the cement mortar and  color change.

The time and frequency of water soaking are also related. The old bricks that are soaked with water once and the old bricks that are soaked twice will have a problem of shades. Therefore, it is necessary to pay attention to the amount of blisters and avoid repeated soaking.

2. Seams between tiles are not handled well

After the tiles are paved, seams treatment can beautify the effect and effectively prevent water infiltration. Grouts, caulks and other materials have a certain waterproof effect. If the seams are not well treated, the remaining moisture on the tiles surface penetrates through the tiles seams and may cause the color change.


3. Waterproof process are not well treated

If color of the tiles in bathroom changed, it is likely that the waterproof work is not done well and there is leakage on the wall surface.

The waterproof layer on the wall of the bathroom should be on the top to prevent water vapor and water from penetrating into the wall. The waterproof layer on the floor should be brushed at least three times to prevent molds and water leakage.

4. Tiles paved are not from same shades

Although the same type of tile, but the different batches of the factory will have a difference in the color, need to be named another shade.When the product is graded at the factory level, or when the worker does not pay attention to the color shade, the color difference between the adjacent tiles will be noticeable.

When accepting ceramic tiles, the owner must carefully check the color number on the same type of product packaging box. If there are products with different batches and color numbers, the seller must be informed in time or refuse the batch of goods. If it is replenishment, it is necessary to check whether it is consistent with the lot number and color number of the first batch of products.


Maintenance section

5. Use the wrong cleaner

Detergents can remove different stains on the tile surface, but may also have a negative effect on the brick surface and internal components. Using the wrong cleaner can destroy the glazed surface of the tile and cause discoloration.

It is advisable for the owner to consult with the properties such as acid and alkali resistance of tiles in order to choose the right detergent to prevent the glaze from being contaminated.

6. Excessive cleaning

When using harder steel balls and other tools for cleaning, if you use too much force, it will leave fine scratches. The scratches may not be noticeable at first, but after large and small scratches accumulate stains, the scratches will be more pronounced, and it looks like the tiles are “ground”.


Quality reasons

7. Water absorption is too high

The strength of ceramic tiles is closely linked to water absorption. When the water absorption rate is low, the compactness of the brick is higher, and vice versa. If the water absorption of the tiles is unqualified, liquid is easily infiltrated into the body, and the moisture enters the glaze to create a print, thereby causing discoloration.

When buying tiles, you can use the water drop to test the water absorption of the tile: Drop the water drop on the back of the tile, and watch the drop status after a few minutes. The more residual of the water drops, the lower the water absorption of the tile. If water stains are found to diffuse into the interior of the tile, it means that the tile has a high water absorption rate and the chance of discoloration after paving is higher.

8. Glaze layer is too thin

The glaze layer of tiles is like a protective film, is effectively anti-fouling, waterproof, anti-corrosion, etc., the glaze layer is too thin may cause dirt sewage infiltration and occur color change. Too thin a glaze may also cause problems such as glazing shedding and glaze cracking. Glazes with poor wear resistance is more easy to leave scratches.

When buying tiles, the thickness between the embryonic body and the glaze can be observed from the side. The high-quality glazed tiles have a high glaze gloss and are very moist and delicate.



9. The aesthetic design of the ceramic tile itself

In order to cater to individual needs, some brands will design a different color effect in the same series of tiles, and the combination of different shades will be more aesthetic in the designer's eyes.

  • 3D Inkjet Cheap Italian Design Porcelain Full polished Glazed Marble Tile.
  • 600x600mm Tiles
  • Dark Color 60x60 cm Super Glossy Polished Tile
  • Sandstone Floor Tile
  • 800x800mm Polished Porcelain Floor Tile
  • Marble Look Glossy Ceramic Wall Tile

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