Mud introduction:
Blue stucco is the grease in purple sand mud, so it is called "mud in mud" (Tuanshan mud is a mixture of purple mud and green mud). The output of green mud is not much, the mud is tender and the fire resistance is lower than that of purple mud. Generally, it is used as powder or coating outside the matrix, which makes the color of purple sand pottery more colorful.
Tea-making effect:
The fragrance of tea is rich and lasting. The teapot mouth is small, the lid is tight, and the inner wall of the teapot is rough, which can effectively prevent the premature loss of fragrance. The purple sand teapot is used for a long time, and there is a layer of brown-red tea rust hanging on the inner wall. The longer it is used, the more tea rust accumulates on the inner wall, so the more alcohol Yufangxin is added to the tea soup after making tea. Long-term use of purple sand teapot, even if you don't put tea leaves, just pour boiling water, still exudes attractive fragrance, which is beyond the reach of ordinary tea sets; Making tea in a teapot keeps the temperature for a long time. Because there are many small bubbles inside the pot wall, which are filled with stagnant air and are poor conductors of heat, the teapot has good thermal insulation performance; Making tea in a teapot is not easy to carry and take.
The linear expansion coefficient of teapot is slightly higher than that of porcelain teapot, so there is no glaze stress. There is little glass after the teapot is fired, which is enough to overcome the sudden change caused by the temperature difference between hot and cold, so the heat transfer is slow. Purple sand teapot has excellent adaptability to sudden changes in heat and cold. Even if it is cooked at Baidu's high temperature, it will not burst if it is quickly thrown into the sub-zero ice and snow. The teapot is not glazed inside and outside, keeping tiny pores, with good air permeability, but impervious to water and strong adsorption, which is incomparable to ordinary teapot. It can keep the aromatic oil in tea volatile when heated to form fragrance, improve the acidity in the later stage of tea soup, and play a role in convergence and sterilization. Therefore, it can delay the deterioration of tea slightly, and the so-called "staying in summer without deterioration" is the truth.
Method of raising pots:
The function of wiping the surface of the teapot with a clean towel is actually to dirty and re-polish the surface. 2-3 hours a day. Don't leave tea soup on the surface of the teapot. Over time, the surface of the teapot will be covered with tea dirt and disfigured, which is a big taboo for players. After a week, there will be red marks on the surface, which is gradually forming a patina bottom layer. As time goes by, the color of the teapot becomes lighter. Leave it for a week. Let the teapot dry naturally. At the same time, the surface is in uniform contact with air, forming a fine and uniform oxide protective layer. Start washing dishes. At this time, your hands must have just been washed and dried. Please don't serve directly. You can put them on the plate for about 30 minutes every day. After a week or two, you can feel the teapot sticky. In fact, it has formed a thin patina. After three months, you will see that the teapot is very aura.
It is especially important to note that if the teapot is dirty, it can be wiped several times with a slightly moist cotton cloth. Then play it for a while. When playing, all areas of the teapot should try to avoid quick success and instant benefit, so you can only take one step at a time, and you can also get a kind of spiritual pleasure with the change of the teapot.
Identify and buy:
At first glance, the texture of the real teapot is fresh and round, the visual effect is sub-smooth, and there are many evenly distributed fine particles similar to metallic luster. The inner wall of some handmade pots has radial lines from the center to the periphery, which belongs to the processing process.
Second, the real teapot feels delicate but not slippery, and the fake teapot feels rough or slippery; For example, ordinary clay feels rough, and porcelain feels slippery at first. If you press the friction slightly hard, you will feel astringent. This is due to the different manifestations of molecular structure.
Three turns, turn the lid, the lid of the real teapot turns flexibly and smoothly, and makes a slight "silk" or "rustling" sound, while the fake teapot made of clay makes a dull "crack" sound.
Listen, knock on the jar with the lid. Although some people disapprove, it is very effective. The knocking sound of the real teapot is crisp and pleasant, and the sound is short, and the sound stops immediately after knocking; The fake teapot with ordinary clay has a dull, rich and short knocking sound; The sound of porcelain knocking is clearer than purple sand, a bit like the sound of metal impact, which is difficult for ordinary people to distinguish. But a very obvious difference is that the wavelength of sound waves in porcelain is obvious. After the tapping, the sound still lasts for several milliseconds, and the real purple sand stops immediately.
Five certificates. Generally, genuine teapot has a certificate written by the manufacturer. Certificates are usually written on rice paper, with a brush, and calligraphy is very beautiful. This is because calligraphy is a compulsory course for a good craftsman, and the value-added of a good teapot is more reflected in the skills of calligraphy and painting, which is stamped. The signature of the seal is the same as that on the bottom of the teapot.
Sixth, test the water. Water poured on a real teapot won't form obvious drops. Water is a relatively uniform piece, and then it will be gradually absorbed by purple sand.
Above, we introduced some knowledge about the blue mortar teapot. First of all, we introduced the mud used in this blue mortar teapot and why this teapot is special, especially in the mud used. Then we will continue to introduce the effect of making tea in this teapot. Then it introduces the skills of buying and identifying this kind of blue mortar teapot, which needs everyone's attention. Finally, we explained how to make a blue mortar teapot.
The above is about the related content of green gypsum teapot, I hope it will help everyone! ?
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