Drinking tea with a black pottery tea set, I heard that it contains a lot of lead, is there any harm

There is no such thing.

In daily life, the tea ware is basically made of porcelain, the key is that the porcelain tea ware is not easy to transmit the temperature to the surface of the tea vessel, in order to prevent scalding, and the ceramic tea set tea taste is more mellow, and it is also convenient to clean, so the utilization rate of ceramic tea set is relatively high. The use of tea sets for pottery utensils is generally harmless, because black porcelain is not poisonous, only need to clean the tea utensils.

The difference between black pottery tea set and purple sand tea set:

First, the characteristics are different.

1. Characteristics of black pottery tea set: delicate, sand-free, viscous, and rich in a variety of mineral elements.

2. Characteristics of purple sand tea set: dense structure, close to porcelain, high strength, fine particles, shell-like or stone-like fractures, but not the translucency of porcelain tires.

Second, the origin is different.

1. The origin of black pottery tea set: black pottery is an excellent pottery species after Yangshao cultural painted pottery, which is called "the art of earth and fire, the crystallization of power and beauty". The world marvels at this ancient civilization!

The black pottery culture is the culture of the Yellow River Basin. With its profound historical connotation and rich humanistic connotation, it constitutes the source of Chinese culture.

2. Origin of purple sand tea set: Purple sand is a special type of pottery, which is abundant in the area of Dingshu Town, Yixing, and Shushan Gunan Street in the northeast of Dingshu City. It is the distribution center of Yixing purple sand ceramic production since the Ming and Qing dynasties.

It preserves the whole industrial chain and material space form of the production, sales and transportation of purple sand pottery since the Ming and Qing dynasties, and has become the research and understanding of purple sand. An important place of historical production and culture.

Third, the classification is different.

1. Classification of black pottery tea sets: black pottery can be divided into three types according to the texture: clay black pottery, sand black pottery, and fine clay black pottery.

2. Classification of purple sand tea sets: mainly divided into three types: purple mud, green mud and red mud.

No. 1. First of all, black pottery tea set.

It refers to a kind of tea set made of natural clay after processing and firing, and the use of black pottery tea set to make tea can make the tea taste rich and fragrant, and even drinking tea will become a luxury enjoyment. The black pottery tea set is rich in carbon ions, which has a good insurance surname and the characteristics of being breathable and impermeable, so it is very suitable for urban white-collar workers who love to taste tea.

2. Secondly, the black pottery tea set is the same as the purple sand tea set, which has a double porous and sponge pore structure, but because the black pottery tea set adopts the carburizing production process, the effect of making tea will be much better than that of the purple sand tea set, and it can also breed tea furry after long-term use. Tea mushroom is a very peculiar thing, even if we don't put tea leaves in the black pottery tea set to boil, but we can still smell the light tea aroma.

3. Moreover, the black pottery tea set has very good heat resistance, even if we add boiling water in the cold winter, the black pottery tea set will not crack due to the sudden change in temperature, and the heat transfer speed of the black pottery tea set is relatively slow, and we will not be easily scalded when we use it.

situation. The thermal insulation performance of the black pottery tea set is also very good, and it will not dissipate heat quickly because of the cold weather, resulting in the tea becoming cold.

Lead is a heavy metal element that seriously endangers human health, and it can affect various organs such as nerves, hematopoiesis, digestion, immunity, and bones. More seriously, it affects the growth and intellectual development, neurobehavior, learning and memory and other brain functions of infants and young children, and can cause dementia in severe cases.

The black jade pot of Tao Yuan black pottery is made of a mixture of clay and sand fired at high temperature, and it has been tested to be harmless to the human body.

Ceramics contain lead because of the glaze, and the real black pottery does not hang the glaze, so it does not contain lead. A glaze is a thin, colorless or tinted layer of vitreous that covers the surface of a ceramic object. It is made of mineral raw materials (feldspar, quartz, talc, kaolin, etc.) and chemical raw materials in a certain proportion (some raw materials can be made into frit first) after grinding into glaze slurry, applied to the surface of the body, and calcined at a certain temperature.

It can increase the mechanical strength, thermal stability and dielectric strength of the product, as well as beautify the utensils, easy to wipe and clean, and not eroded by dust and filth.

Black pottery is divided into four categories: black gray black pottery, black black pottery, carburized black pottery, and eggshell black pottery.

The black color of the black pottery is the color of metallic iron and manganese compounds, not the color of lead, which is silvery-white.

Jet black pottery, carburized black pottery, eggshell black pottery black and carbon element color. Not to mention that the lead is not hanging on the edge.

However, there are always some unscrupulous traders in the market, using shoe polish, hanging glaze, paint and other means to make fake and shoddy black pottery, and there may be substances such as lead in these fake and shoddy black pottery.

So rest assured that the black pottery will not contain any lead. As early as the 80s, the national inspection department carried out the black pottery inspection, and the inspection results showed that the black black pottery, carburized black pottery, and eggshell black pottery did not contain any toxic substances, and could still raise flowers and vegetables after being broken. Wildfires burn inexhaustibly, and spring breezes blow and regenerate.

The purple sand, ceramics and so on are not good, the more high-end porcelain is more toxic This is the industry consensus, and pure black pottery does not contain toxic substances.

Black pottery tea set. Natural clay is used as the plate.

Through the firewood kiln. Of course, the kiln is transformed, whether it is boiling tea or holding raw and cooked hot and cold ingredients, it is all original, just like the ancient people's "gathering incense and containing Shu, and the fragrance is not loose". Compared with other materials of tea sets, its tea is more mellow and fragrant.

Black pottery tea set has excellent refrigeration, which is not only the characteristics of its breathable water barrier, but also the nitriding color containing carbon particles, which is only a characteristic of pottery utensils. Just like the ancient saying, "the more you stay in the tea, the more you stay in the summer", this kind of characteristic is especially integrated into the modern city of Chinese white-collar workers who love to drink tea. Even if you accidentally stay for a few days, you can use the good recipe for washing the pot described by Wu Qian, a Qing person:

The pot is full of boiling soup, poured, that is, there is no cold water, it is also urgent, the cold water is discharged, and the original gas is restored. ”

Pottery utensils and purple clay pots.

It is the same as the double vent and sponge vent structure, and the characteristics of the air permeability water barrier are basically the same, but because the pottery utensils have more nitriding process, its structure is more suitable for boiling tea, and it has the characteristics of long-term use and growth of tea mushroom.

Black pottery tea set is very suitable for tea cultivation, with long-term application and excellent quality. Not only is the tea tea brewed more mellow and mellow, but the color of the container is getting stronger and brighter, and the dark light is dark, which makes people want to stop. Just like "Yangxian Tea Pot Series".

The description: "The pot is used for a long time, and the spontaneous dark wings can be learned."

Black pottery tea has good temperature resistance, good hot and cold rapid transition, and cold weather.

Even if boiling water is introduced in the New Year, it is not easy to swell and crack due to sudden changes in temperature (there are dark wounds on the body of the pot, another story).

Black pottery tea set heat conduction.

The relativity is sluggish, and it is less likely to get hot when it is used. In addition, pottery utensils are also insulated for a longer time due to slow heat conduction, which is also a valuable benefit for semi-fermented tea.

Pottery clay has good ductility and ductility, and then used to make pots, can make teapot lids, spouts.

It has good airtightness, tight mouth cover, and very few gaps, which reduces the flow of mold-containing gas into the pot, and relatively increases the time for the soup color mildew, which is conducive to health.

Because gray and black have been the representatives of "solemn, steady, erudite and elegant" since ancient times, it not only counteracts the simplicity of the color of pottery utensils, but also obtains the reputation of "color single and rhyme, dignity and elegance" for pottery utensils.

Pottery clay is very good ductility and ductility, or the forming techniques are varied, can be used in wheel plastic, hand plastic, rubber and plastic products, knife molding, etc., or the most colorful pottery forming skills, can give full play to the design inspiration of the master of processing technology and raw flowers skillfully, can be made into a variety of forms, thousands of postures, the life of the pottery utensils container.

There is no harm, ceramic tea sets, cups, and ceramic containers that are imported from the food are all covered with a layer of high-temperature glaze, most of which are mainly transparent high-temperature glazes, and this kind of glaze fired at high temperatures is not harmful to the human body!

Tea is a special rock item containing high lead, and there are several aspects of lead in tea, such as high lead content in tea garden soil, lead in old processing machinery alloys, lead in fertilizer, and lead pollution from automobile exhaust tea trees. In addition, some unscrupulous businessmen add a large amount of lead and chromium green to the tea in order to increase the light and color of the tea, which will make the lead content in the normal tea exceed the standard.

However, the water solubility of lead is not high, as long as it is within the specified level, there is no harm to the human body. The national health standard stipulates that the lead content in tea should be 2 mg kg. It can be drunk with confidence within this range.

How to drink tea safer? Experts have confirmed through experiments that the dissolution of lead in neutral water is very low, but the dissolution in acidic or alkaline liquids has increased, so the tea should be made with qualified tap water, when the ridge or the right selection of qualified natural water soaked tea, with a porcelain pot or purple clay pot is better than with a metal pot to make tea.

In addition, the Ministry of Agriculture's tea quality inspection must have carried out such a test a few days ago: the Shanghai Municipal Bureau of Technical Supervision sent to the sampling of the highest lead content of 4 kinds of Longjing tea, imitation tea, with 100 degrees Celsius boiling water for 1 hour, after measuring the lead content in the tea soup, the results of the four kinds of tea soup did not detect lead. It can be seen that although the lead content in tea is high, these lead is not soluble in tea soup or the leaching rate is very small, so it can be considered that it will not be ingested by the human body.