A few days ago, the State Administration of Quality Supervision, Inspection and Quarantine's "2009 Second Batch of National Supervision and Spot Inspection of Product Quality Announcement" announced the results of supervision and spot inspections of 364 types of ceramic products produced by 272 companies in 8 provinces. There are 97 kinds of ceramic products on the "blacklist". Among them, 37 products have unqualified water absorption and become the "leader" on the list.
Ceramic tiles are an indispensable material in decoration, accounting for a large proportion. However, water absorption is an important criterion for testing the quality of tiles, but not many consumers pay attention to it. The water absorption of ceramic tiles is also an important criterion. Ceramic tiles with high water absorption generally have smaller voids and lower density. On the contrary, ceramic tiles with low water absorption have higher density. Choose tiles with low water absorbency in the living room, as frequent activities may bring regular dirt, and loose tile pores can easily absorb water and dirt, causing embarrassing and difficult-to-clean marks. The way to judge the water absorption rate of ceramic tiles is very simple. Just put a drop of water on the back of the sample ceramic tile and observe whether it can absorb quickly.
Very few people ask about its water absorption rate
Member Ms. Sun told reporters that the most important thing she pays attention to when buying ceramic tiles is the color, and she wants to find one that matches the decoration style of her home. tiles. During the introduction, the shopping guide only asked about the area of ??her home and did not mention the word "water absorption rate." The reporter also found in many ceramic product stores that if consumers do not ask, shopping guides generally will not take the initiative to mention water absorption, and "water absorption" has become a lonely word.
In fact, ceramic tiles will expand to a certain extent after absorbing water. Inferior ceramic tiles have a high water absorption rate, and the surface of the ceramic tiles will crack due to expansion. Dirt in the water can easily be inhaled. After long-term use, it is easy to Produces odor. Therefore, when choosing ceramic tiles, you must first pay attention to their water absorption index. The water absorption index refers to the ceramic product's ability to absorb and penetrate water. The lower the water absorption rate, the better.
Do experiments to test the water absorption rate of ceramic tiles
Many consumers know a way to test the water absorption rate, which is to drip water on the back of the ceramic tile. If the water seeps quickly, the water absorption rate is high and the product quality is low. Not good; on the contrary, the water absorption rate will be low and the product quality will be good. The water absorption rate of ceramic tiles is one of the criteria for measuring the quality of ceramic tiles. Take vitrified tiles as an example. Ceramics with a water absorption rate of less than 0.5% in the national standard are called vitrified tiles. The lower the water absorption rate of porcelain polished tiles, the higher the degree of sintering of the ceramic tiles, the better the density, and the relative anti-fouling ability. The better.
Consumers can weigh the product when purchasing. Ceramic tiles of the same specifications that are heavier have lower water absorption and better intrinsic quality. In addition, tap the tiles gently and listen carefully to the sound. Products with better quality will sound crisp and pleasant, while products with poor quality will sound dull and make an "empty" sound when tapped.
It is very important to do thorough research when choosing ceramic tiles
Member Mr. Lu has had decoration experience. He said that he knows the "water absorption rate" and that water absorption is one of the important criteria for evaluating the quality of ceramic tiles. But when I was buying, I asked a question in a hurry, but the shopping guide interrupted me with something else, and later I forgot to ask again. Fortunately, there was no problem with the ceramic tiles I bought. Mr. Lu joked: "On the one hand, I am negligent, but the shopping guide can also 'hide and seek'."
The house will be with you for decades, and you must inquire thoroughly about the materials for decoration and purchase, so consumption When purchasing, buyers should not only ask about the water absorption rate, but also check it carefully with their own hands.
Under sufficient natural light, if the brick is placed 1 meter away and observed vertically, no obvious glaze defects should be visible. The shading and trademarks on the back of high-quality ceramic products are clear and complete, with few glaze marks or defects.
It is worth noting that good products have smaller size deviations. Place a batch of products vertically on a flat surface to see if there is any unevenness. To check the flatness, you can put the edges of two bricks close together to see if there are any gaps. A good product will have little deformation, and the brick surface will be smooth and beautiful after paving. When delivering the product, carefully check the product packaging box, which should have the factory name, factory address, product name, after-sales service phone number, specifications, quantity, trademark, production date and the standards implemented.