What is the classification of ceramic tableware

Summary: China is an ancient country of ceramics, ceramic culture has a long history, ceramic types are numerous, daily ceramic tableware according to different characteristics will have different classifications. How much do you know about ceramic tableware? The following article is specific for you to introduce the classification of daily ceramic tableware, and teach you how to choose daily porcelain, I hope you can help, hurry to see it! What is the classification of ceramic tableware daily ceramic purchase strategy

Ceramic tableware classification

Per porcelain: the current market circulation of magnesium porcelain, bone china, reinforced porcelain, shellfish porcelain, new bone china, etc., of which bone china is the most high-grade.

Per ceramic: can be divided into hard and soft porcelain. Hard porcelain more than one firing at high temperatures, soft porcelain is more high-temperature firing low-temperature glaze firing process. As the glaze firing temperature is different, different raw material formulations, relatively speaking, soft porcelain glaze containing low melting point oxides more. So the hard porcelain glaze hardness than soft porcelain to be greater, the use of knives and forks are not easy to scratch out scars, but the soft porcelain glaze smoothness, brightness is generally better than hard porcelain, the naked eye to observe more soft and moist.

Decorated according to the flower surface: decorated according to the flower surface can be divided into glaze, glaze, under the glaze and color glaze porcelain and some uncolored white porcelain.

Glazed: glazed ceramics are ceramic pigments made of flower paper pasted on the glaze or directly to the pigment painted on the surface of the product, and then by 700 ℃ ~ 850 ℃ high temperature baking and firing of the product. Because the baking temperature does not reach the melting temperature of the glaze, so the flower surface can not sink into the glaze, only close to the surface of the glaze. If you touch with your hand, there is a bumpy feeling, and the naked eye can see the unevenness.

Glaze in color: glaze in color ceramic baking temperature is higher than the glaze in color, to reach the melting temperature of the glaze products, ceramic pigments in the glaze melting sink into the glaze, after cooling by the glaze layer covered. Touch the surface of the product is smooth as glass, no obvious bumpy feeling.

Underglaze: underglaze ceramics is a traditional decorative method in China, the products of all the colorful decorations are carried out on porcelain blanks, after glaze firing at high temperature. This product and glaze color, flower surface is covered by glaze, the surface is bright, flat, no high and low feeling.

Color Glaze Porcelain: Color Glaze Porcelain is a high-temperature colorant added to the glaze of ceramics, so that the glaze of the fired products show a particular color, such as yellow, blue, soybean green and so on.

White porcelain: white porcelain usually refers to the ceramics without any color decoration, this product is generally more for the hotel or restaurant hostel use.

The above several decorative ways to compare up, underglaze color more traditional blue and blue lingerie-based, color is more monotonous, affordable; glaze color than underglaze color rich, product grade is higher, but the process requirements are strict, and the cost is high, the price is high, the current production in the industry is not large, and thus the amount of inputs into the domestic market is also small; glaze ceramics rich in color, three-dimensional sense of strong, convenient processing The cost is correspondingly low, more than 80% of the products on the market in China is glazed ceramics. Some glazed products have reached a high-grade level, new styles, good quality, high prices, to meet the needs of the urban high-income class and high-grade hotels, but most of them still belong to the middle and low-grade products, the price is relatively inexpensive.

In addition, the low-grade glazed ceramic tableware in the flower paper processing may use poor quality pigments, or in the design of the flower surface of lead, cadmium-containing high amount of pigments, and even firing temperature, ventilation conditions are not enough, such a situation is likely to cause the pigment in the amount of lead, cadmium dissolved in the exceeding standards, long-term use of such ceramic tableware will cause harm to the human body.

How to buy daily ceramic tableware

Daily ceramics refers to the daily life often use cups, plates and dishes. It is our intimate contact with food media, its safety and our health can be said to be closely related, so the purchase of special attention. Especially now, more and more manufacturers in order to pursue low-cost, high profitability of the benefits of uncontrolled manufacturing a variety of shoddy products, long-term use of these products may have a negative impact on human health. Therefore, it is essential to choose the right, healthy daily-use porcelain. Selection must pay attention to the following points:

1, the purchase of ceramic tableware, please try to buy in the formal brand ceramic stores, and do not be greedy for cheap on the street to buy informal manufacturers of shoddy ceramics, because the streets of ceramics no brand and production standards, security is more difficult to guarantee. State regulations, the ceramic tableware placed in 4% of the acetic acid immersion, the amount of lead dissolved shall not be greater than 7 mg / liter, the amount of cadmium dissolved shall not be greater than 0.5 mg / liter. Currently regular manufacturers of products can basically meet this requirement;

2, when buying, pay attention to the color of the tableware, touch the surface of the tableware with your hand to see whether the inner wall is smooth and clean, there is a bumpy feeling is proved to be glazed decorations, try not to buy; instead of choosing the raw materials, the process of controlling the more stringent glaze in the glazed color, the glaze under the color of tableware

3, if the family often use dishwasher If the family often use dishwasher, then need to choose the edge of the thicker with arc-shaped strengthen the edge of the product, so that it is not easy to damage;

4, there is a pungent smell or color is too bright do not buy. In order to make the color bright, manufacturers will add some heavy metal additives in the glaze, therefore, the more brightly colored tableware, heavy metals are more likely to exceed the standard;

5, tableware in the use of boiled water before cooking for 5 minutes, or vinegar soak for 2-3 minutes, in order to dissolve the tableware in the toxic substances.

6, in general, plates, bowls, cups should not have patterns on the inner wall, because of the presence of glaze decoration of lead, cadmium and other heavy metals, especially bowls and cups are in direct contact with our mouth, long-term consumption of human health is not beneficial.

7, when choosing should pay attention to the pattern color is bright, not bright, then it may be insufficient baking temperature, cadmium, lead out of the amount of higher, not very good.

8, to determine the existence of cracks, can be tapped on the edge of the mouth, if the sound of hoarse is inferior.