Home decoration must buy tiles, how to buy value for money, satisfactory tiles also have a certain knowledge, in general, the principle of buying tiles are: a look, two, three drops of water, four feet.
First, look at the appearance. The color of the tiles should be uniform, the surface finish and flatness should be better, the surrounding rules and patterns should be complete, and four or five pieces should be extracted from a box to see if there are any defects such as color difference, deformation, missing corners, and less angles.
Second, listen to the sound. With hard objects tapping, the more crisp the sound, the higher the porcelainity and the better the quality. You can also use your left thumb, forefinger, and middle finger to clip a corner of the tile. Hang it down easily and tap the lower part of the tile with your right index finger. If the voice is clear and sweet, it is the top grade. If the sound is boring, the turbidity is the next product.
Third, dripping test. The water droplets can be on the back of the tile to see how quickly the water spreads after infiltration. In general, the slower the water absorption, the greater the density of the tile; on the contrary, the faster the water absorption, the denser the density, and the inherent quality of the former is excellent.
Fourth, the amount of feet. The higher the accuracy of the tile side length, the better the effect after paving. Buying high-quality tiles is not only easy to construct, but also saves man-hours and accessories. With a tape measure, there is no difference in the size of each tile, and the highest precision is the top grade.
In addition, to observe its hardness, the ceramic tile has good hardness, high toughness, and is not easily crushed. Scratches between the tile corners and tiles to see whether the broken pieces are broken or loose, whether hard, brittle, or soft, whether it is left scratches or scattered powder, if the former is the top grade, the latter is the top quality. difference.
The criterion of whether the size is the key to judging whether the tile is good or bad is to use a tape measure or a caliper to measure whether the diagonal line and the four sides of the tile are uniform in size and thickness. The good tile has a crisp sound, indicating that the porcelain content is high. If the sound "buzzes" with a crack, it means there is a crack in the brick.
A good tile, the master installation is also convenient for construction, and the effect of installation is also standardized.
Ceramic wall quality appraisal 7 method
Tiles can be divided into wall tiles and floor tiles according to their location. The main difference between the two is that the water absorption rate of tiles is much lower than that of wall tiles. Wall tiles strictly speaking should belong to ceramic products, and floor tiles are usually porcelain products. Both have great differences in the selection of clay ingredients and firing techniques, resulting in their physical characteristics are also very different, wall tile absorption rate of about 10%, while the floor tile water absorption rate is usually only about 1%.
Uses: Floor tiles for low water absorption should be laid on the floor of the bathroom and kitchen. Because the ground will often wash with a lot of water, so that tiles can not be affected by water vapor, do not absorb stains.
The use of wall tiles on the ground can make it difficult to clean due to too much water. Wall tiles are made of glazed ceramics and have a high moisture content. Their backs are generally rough. This also helps adhesives attach wall tiles to walls. Floor tiles are not easily affixed to the wall. Visible walls Floor tiles cannot be mixed.
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Cell Culture plates provide the right environmental surface to cultivate microorganisms. Choose from a variety of treated and untreated plates and dishes in multiwells or uniform flat bases. Some of the features include optically-clear for easily viewing cells, stacking beads for easier handling, and gamma sterilized and certified nonpyrogenic.
Product material: made of polystyrene
Product features: Each hole is marked with numbers and letters, which is easy to locate. One section of the plate cover has two bevel guides to prevent cross-contamination.
Features:
Easy to locate: alphanumeric labeling
Increased hole edges: reduces the risk of cross-contamination
Independent packaging: each culture plate is individually packaged
The tightly integrated hole cover can effectively prevent the contamination and evaporation loss of the medium during the cell culture process
Good stability: Innovative cover edge diversion design, which greatly improves the circulation and exchange of air in the plate
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