What is the difference between purple sand mud and purple sand cement and vermilion mud

Clear cement of purple sand mud: Clear cement is not clear water and mud, and it cannot be interpreted literally!

1. Clear cement and vermilion mud.

The mud properties are different.

The mud of vermilion is high, the sand content is low, the sand is weak, and the mud is very delicate, and the molding process is also difficult. From green billet to firing, the shrinkage rate is as high as 30%-40%, the support degree is poor, and the general yield is only about 7%. The large pot type has a low yield rate, and the small pot is cute and agile after it is formed.

Clear cement slurry: easy to grasp dry and wet, high stability, reasonable viscosity, easy to form. The old mud must be refined, otherwise it is easy to have black edges and flower mud.

When refining, the source of iron oxide must be retained.

and the removal of limestone.

2. The characteristics are different.

Vermilion mud is a kind of mud belonging to purple sand red mud, which is named because the main ingredient is red mud (extremely high iron content). Vermilion mud is the best of the red mud. Generally speaking, there are three types of vermilion: 1. Red with a slight yellow; 2. Slightly reddish in yellow; 3. Slightly purple in red (high temperature vermilion).

The clear cement mud is mellow and elegant, the literati atmosphere is strong, and the large and small works can show the elegance of purple sand; It is easy to resonate with the user, and it is one of the mud materials used by the potters in the early Ming Dynasty to make the old man crack.

Laoqing cement purple sand is also called clear water sand red purple mud, the mud is a pure purple mud mine, Yixing Dingshan potters call it "common mud", which is a more common mud; Players are accustomed to calling it "Red Purple Mud".

Clear cement purple clay pot features:

1. Good sealing: The clear cement purple sand pot has a precise pot-making process, and the purple sand pot made of purple sand has a tight lid and few gaps, which can effectively reduce the air flow of mold into the pot and prolong the deterioration time of the tea.

2. Retain the aroma of tea: When using a clear cement purple clay pot to brew Pu'er tea, it can make the tea taste more mellow. Because the clear cement purple clay pot can absorb the aroma of tea, the purple clay pot that often makes tea occasionally does not put tea leaves, and the white water in the pot will also have the faint fragrance of tea.

3. Easy to wash: It can be washed and dried in flowing water. If you don't use it all year round, you can also blanch it with boiling water 2 to 3 times, and then pour out the warm water, and make tea again without leaving the smell of tea scales.

4. The body of the pot is resistant to cold and heat: the cold and heat of the clear cement purple clay pot is extremely abrupt, and it can be stewed on a warm fire or heated in the microwave, and the body of the pot will not burst in both ways.

5. Excellent thermal insulation performance: the clear cement purple clay pot is made of mud, the heat transfer is slow, and there is no hot feeling when used. At the same time, it also has a strong heat preservation ability, and the tea is still mild within 20 to 30 minutes of making tea in winter.

The bottom tank mud is the high-end material of the purple sand pot, as far as a pot is concerned, if the bottom of the raw ore is clear, it will be a grade higher, usually high-grade.

The bottom groove is a kind of purple mud, the purple mud atmosphere head groove, two grooves, and the bottom groove, the bottom groove is in the lowest position in the purple mud, the bottom groove green sand texture is strong, the gap between the sand and the sand is more, the air permeability is good, it is conducive to tea, after brewing, warm and moist, simple and elegant, more purple sand simple charm.

Features of bottom groove clearing

The biggest feature of the bottom groove clear ore is that there are spots, known as corns, the corns will show yellow after firing, you can see the yellow particles, and the purple jade gold sand has many similarities, such as the stars, this is the charm of the bottom groove clear, to say what grade of mud is the bottom groove clear mud, the bottom groove clear is one of the most popular mud in the purple mud.

The temperature of the bottom trough green mud kiln is also relatively high, the eating temperature needs almost 1240 degrees Celsius to sinter, the temperature is reached, the color of the firing is purple-red, if the temperature is slightly lower, the burn is earth red, the bottom trough green mud is soaked for a while, it is the color of pig liver, the mud is particularly warm and moist, and the feel is excellent. After burning at a high temperature of more than 1300 degrees, it is blue, with good air permeability, which is especially suitable for making old tea.

The clear cement and vermilion mud in the purple sand have four main differences: mud, firing temperature, shrinkage ratio and color.

Qing cement is a purple sand raw material from pure purple mud ore that directly stale and retastes mature mud, also called "Pu mud" produced in Yixing Huanglong Mountain. The mud of clear cement is easy to grasp the dry and wet, high stability, reasonable viscosity, and easy to form, which is one of the favorite muds used by purple sand artists in the early Ming Dynasty, and it is also the favorite mud of Gu Jingzhou during his lifetime. Vermilion mud is a kind of mud belonging to the purple sand red mud, vermilion mud is the fine product of red mud, because the main ingredient is red mud (iron content is extremely high), and it is produced in the lower layer of tender mud mine, also known as "the stone bone that has not touched the wind", the meaning of the stone bone is the soil block that has not been completely weathered, the quality is as hard as a stubborn stone, but it will collapse by itself when it encounters water.

The molding process of pure vermilion clay is very difficult, the firing rate of finished products is low, and the large pot type cannot be made, and the small pot type is cute and smart.

The firing kiln temperature of clear cement: 1160 1180 degrees; Shrinkage ratio: about 11%.

The firing kiln temperature of vermilion is 1000-1040 degrees, and the shrinkage ratio of pure vermilion is 30%. It can be clearly seen that the firing kiln temperature of vermilion mud is lower than that of clear cement, and the shrinkage ratio is larger.

After a long period of use, the mud color changes from brown to vermilion, which is ruddy and mild. Vermilion is slightly orange, warm and transparent, and the color is brighter than that of clear cement.

Diagram of a clear cement purple clay pot:

Illustration of the vermilion purple clay pot:

It is two different kinds of mud, both belong to the purple sand category, vermilion is vermilion, the shrinkage rate is high, the yield is low, the clear cement is more common, relatively speaking, the value of vermilion is higher, of course, it depends on the type.

Clear cement: clear cement is pure purple mud directly processed and matured, clear cement dry and wet is easy to master, the stability is very high, the viscosity is also very reasonable, the forming is relatively easy, and the old mud is easy to appear black edges. Purple Mud:

The purple mud is purple-brown, the iron content in the purple mud is relatively high, the particles contained in the mud are relatively large, and the structure is loose. <

1. Clear cement: Clear cement is pure purple mud, directly processed and matured, known as Pu mud, is a more commonly used mud, the origin is Huanglong Pass, Dingshan, Yixing, Jiangsu. The dry and wet of clear cement is easy to master, the stability is very high, the viscosity is also very reasonable, the forming is relatively easy, and the old mud is easy to have black edges.

2. Purple mud: Purple mud is purple brown, which is a relatively common typical purple sand mud, which is extracted from the purple sand raw ore excavated in the Huanglong Mountains of Yixing, Jiangsu. Purple mud is divided into raw ore, purple mud and clear cement, as well as bottom groove clearing.

Clear cement is pure purple mud directly aged and processed into cooked mud, and the bottom groove is the bottom residue of raw ore purple mud accumulated and weathered mud.

Purple mud is more breathable than clear cement.

Purple mud is a kind of ceramic raw material produced by traditional famous kilns, which is popular for its good air permeability, moisture absorption and thermal insulation properties. In contrast, the air permeability of clear cement is poor, and the moisture will be retained on the surface and is not easy to be volatilized, so it is not dismantled and breathable like purple mud.

In the tea art, the purple mud pot can make the tea soup fully contact with the air because of its good air permeability, making the tea fragrance more intense. The clear cement pot is not breathable, and the tea soup is difficult to contact with the air, so the taste of the tea soup is lighter than that of the Lunian school. Therefore, in general, the materials used to make a teapot have a great impact on the quality and taste of the tea.