(1) Water absorption rate: Under certain conditions, the ratio of the water inhaled by the tile to the weight of the brick is the water absorption rate. Water absorption is the most important indicator to measure the performance of ceramic tiles. It reflects the degree of vitrification inside the ceramic tile. The lower the water absorption rate, the better the degree of vitrification. The less the product is easy to absorb dirt, the more durable it is.
(2) Mohs hardness: indicates the ability of the product to resist external mechanical action. There are ten grades of Mohs hardness, namely talc grade 1, gypsum grade 2, calcite grade 3, fluorite grade 4, apatite grade 5, feldspar grade 6, quartz grade 7, topaz grade 8, corundum grade 9, Diamond level 10.
(3) Cold resistance: also known as anti-cold and rapid heat, is a sign to measure whether the products can be used normally under the climate with large temperature changes. This indicator is in the climate with large temperature difference between day and night in the north. Especially worthy of attention.
(4) Abrasion resistance: The wear resistance is described by the volume of ceramic brick powder which is ground under a certain force and a certain amount of abrasive and a certain number of revolutions. The more ceramic brick powder is ground, the wear resistance The worse. The wear-resistant tiles are resistant to heavy pressure and are not easy to wear. They are used for a long time and are especially suitable for use in public places.
(5) Strength: The tile with good strength is strong in crack resistance. The minimum compressive strength of the national standard tile is 27Mpa, which is equivalent to 400 80KG people standing on the area of ​​one foot. The higher the strength of the tile, the higher the anti-heavy pressure. it is good.
(6) Chromatic aberration: Place the tiles flat on the floor and arrange them into a square meter. If you look at the distance of three meters, you can see whether the color is different in depth or not.
(7) Blank: Cracks appearing on the blank, and qualified ceramic tiles cannot.
(8) Pinhole: A needle-shaped hole that appears on the brick surface.
(9) Spot: The color of the brick surface is stained.
(10) Interlayer: The layer body has a layered crack or a small piece of peeling.
(11) Mamian: The concave pits on the front of the product, but the effect of the antique bricks is not listed here.
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