Recently, the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China announced in its “2009 Second Batch of National Quality Supervision and Inspection Spots for Quality Supervision†that the results of supervision and inspection of 364 ceramic products produced by 8 provinces and 272 enterprises were announced. 97 kinds of ceramic products were introduced. "Blacklist", among them, 37 kinds of products failed to absorb water, and became the "leader" on the list.
Tiles are an indispensable material in the decoration, accounting for a large proportion, and the water absorption rate as an important standard for testing the quality of the tiles, but there is not much consumer attention. The water absorption of tiles is also an important criterion. Tiles with high water absorption generally have small voids and relatively low density, whereas tiles with low water absorption have relatively high density. In the living room, choose tiles that are less hygroscopic, as frequent activities may cause regular soiling, and loose brick holes can easily absorb water and dirt, resulting in blemishes that are not easily cleaned. The method of judging the water absorption rate of a tile is very simple. Just drop a drop of water on the back of the sample tile and observe if it can absorb quickly.
Very few people ask about it
Ms. Sun told reporters that the most important thing for her to buy a tile is the color, and she wanted to find a tile that matched her home decoration style. When the Purchasing Guide was introduced, she only asked about the area of ​​her home. No mention was made of the term "water absorption rate." The reporter also found in a number of ceramic products stores, if consumers do not ask, the Purchasing Guide will generally not automatically mention the water absorption rate, "water absorption rate" has become a lonely word.
In fact, the tile will inflate into the water and will produce a certain degree of expansion. The inferior tile has a high water absorption rate. The surface of the tile is cracked due to expansion. The dirt in the water can be easily inhaled. Prolonged use can easily cause odor. Therefore, when selecting tiles, it is necessary to pay attention to the index of water absorption. The index of water absorption refers to that ceramic products have a certain ability of absorbing and penetrating water, and the product with lower water absorption rate is better.
Experiment to test the water absorption rate of the tiles
Many consumers know a method to test water absorption, that is, dripping water on the back of a tile. If the water seepage is fast, the water absorption rate is high and the product quality is not good. On the contrary, the water absorption rate is low and the product quality is good. The water absorption of tiles is one of the criteria for measuring the quality of tiles. In the example of vitrified tiles, ceramics with a water absorption below 0.5% in the national standard are called vitrified tiles. The lower the water absorption rate of porcelain polished tiles is, the higher the degree of sintering of the tiles is, the better the compactness is, and the relative dirt-repellency is better. The better.
When consumers purchase, they can see the weight of the product. Tiles of the same specifications have low weight and high water absorption, and their internal quality is also good. In addition, tapping on the tiles and listening to their voices, the products with better quality will sound crisp and sweet, and the sound with poor quality will be dull and they will send out an “empty†sound.
Tile selection is very important
Mr. Lu had a decoration experience. He said that he knew the “water absorption rate†and knew that the water absorption rate was one of the important criteria for examining the quality of the tiles. However, when asked to buy it, he was hurriedly asked by the guide buyer to use other words. , And later forgot to ask again, fortunately bought back the tiles did not appear any problem. Mr. Lu quipped and said: "Own negligence is on the one hand, but the Purchasing Guide will also be 'hidden cat'."
Houses must accompany themselves for decades, and materials for renovation must be thoroughly investigated. Therefore, consumers should not only ask about the water absorption rate, but must also check with their hands.
Under sufficient natural light, the tiles should be observed vertically at a distance of 1 meter, and no obvious glazed defects should be visible. The shading and trademarks on the back of high-quality ceramic products are clear and complete, with few lacquer or defects.
It is worth noting that a good product has a small dimensional deviation. Put a batch of products vertically on a flat surface to see if there is any unevenness. Looking at the flatness, you can close the edges of two bricks to see if there are any gaps. Good product deformation is small, and the brick surface is flat and beautiful after paving. When shipping, we must also carefully inspect the product packaging box, which should have the name, address, product name, after-sales service phone, specifications, quantity, trademark, date of manufacture, and standards implemented.
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