First of all, we must understand that ceramics include pottery and porcelain. The difference between the two is that the materials used and the firing temperature are different, and both are indispensable.
Pottery: It can be made of various mineral clays, including porcelain clay. The firing temperature is low, mostly between 700- 1000℃. The matrix has a high degree of sintering, no porcelain phenomenon and dull tapping sound.
1769 imperial poem: the pottery jar is printed with ash, which is dry and ugly.
Porcelain: fired with porcelain clay (i.e. kaolin) with high alumina content. The firing temperature of porcelain is at least above 1 100℃, and the fetal quality is basically porcelain, with a crisp tapping sound.
Ru Ci Green Glazed Binaural Dinglu in Northern Song Dynasty
Purple sand: made of purple sand mud, it is a specialty of Dingshu Town, Yixing City. Strictly speaking, purple sand is also a kind of pottery.
Advantages of purple sand
First, the soup is not fragrant or ripe.
Chronicle says it "has neither fragrance nor soup flavor". This is because purple sand has a good taste preservation function, making tea without losing its original flavor, and there is no odor brought by the tea set itself. Fragrant and elegant, with good color, fragrance and taste.
Second, summer is getting worse and worse.
The so-called aged tea does not mean that the inexhaustible tea soup will not go bad the next day after overnight, and it can even be drunk, which I am afraid even the refrigerator can't do. It means that the ceramic cover of the teapot has holes, which can absorb water vapor, so that water drops do not form on the cover and drop into the tea leaves to stir the tea leaves and accelerate the fermentation of the tea leaves.
However, the general ceramic tea set has smooth wall, poor air permeability and lagging condensed water droplets, which makes tea frequently stirred, easily promotes mold propagation and causes tea fermentation. Even if the tea soup really goes bad, it will not grow greasy moss, which is convenient for cleaning.
Third, Yingrun patina
The teapot is used for a long time, and it will become more and more shiny and lovely because of the nourishment of tea soup. Long Wen said in Teahouse: "Cherish your love, just like holding a pearl. It's been used for a long time, purple jade outside, Yun Lan inside. "
Compared with purple sand, there are many kinds of ceramics. In ancient times, the five famous kilns of Guan Ge Ru Ding Jun have long been famous overseas, with a wide variety. Now with the progress and promotion of technology, the proportion of mud is becoming more and more abundant. More modeling changes and rich color changes are suitable for more people's aesthetics, which is beyond the reach of teapot.
Porcelain tea set
Second, the production efficiency is high and the first acquisition cost is low.
Ordinary ceramic tea is formed by wire drawing, semi-manual molding and grouting. Authentic purple sand is mostly formed by hand and semi-hand (manual grouting and embryo painting will destroy the characteristics of purple sand). So the production efficiency of ceramics is much higher than that of purple sand. Judging from the same utility, the acquisition cost of general ceramics is lower than that of purple sand.
Although the purple sand tea set is good, the purple sand market is mixed, and it is difficult to distinguish between true and false. The sales platform only sells, and no one undertakes quality assurance. Buyers can only tell the truth from the false, but buyers are not experts. Those with low prices dare not buy, and those with high prices are not necessarily true. Spent money, but also as a big head.
Nowadays, porcelain is fashionable, beautiful and cheap, but the quality of tea is slightly inferior. It is the best choice for people with low demand, which not only improves the taste of life, but also can be safely and healthily drunk.
Understand the characteristics of tea sets, then choose different utensils according to your own preferences and consumption power, appreciate different tea rhymes and cultivate your own temperament.