When I was about to get off work, there was a power outage. At this time, the ball mill used to grind purple sand ore and manganese powder was also out of power.
After the power outage, employees were busy getting off work and forgot to turn on the power switch.
Then when he went to work the next day, the machine was already running. He thought it had been grinding for a long time, so he directly sent the materials to be mixed into mud.
However, in fact, the power has only been turned on for ten minutes, and the powder has not been ground for the specified time at all. The natural manganese powder is not fine enough.
However, many accidents will create history.
After the clay was fired, the insufficiently ground manganese powder particles were evenly distributed on the body of the pot, which produced an unexpected effect. Later, this mixed clay was called Black Star Clay.
In fact, this is really a coincidence. If the call time is earlier, the manganese will be ground finer, and it will become purple mud, and there will be no black star dots effect.
After recognizing the black star soil, Chen Wenzhe looked at the mud used by Zhao Dayong and knew that it was probably a new batch of mud.
Chen Wenzhe knew that in the past purple sand factories, earth bones and stone yellow were added to make the clay darker.
Because the iron content of these two things is relatively high, much higher than purple mud, iron oxide will gradually turn black as the temperature increases.
Zisha No. 1 Factory is the leader in clay blending. Most of the current configuration methods are from the previous factory.
Therefore, the factory products that some people buy now are most likely made of chemical materials.
The biggest difference between chemical materials and mineral materials is that the purple clay teapots produced cannot be maintained.
The teapot made of chemical materials is made of clay and chemical raw materials.
No matter how you maintain such a work, it will not change much, it is dry and does not drink water.
In other words, it has no water absorption. If water is poured on the pot, it will flow directly down or form water beads instead of being absorbed by the pot body.
This is not their fault, it is all due to historical reasons. After all, most of the pots produced from the original mines of this mountain are not very good-looking when they come out of the kiln, even those ranked in the No. 1 clay material.
It is also because of market demand that there are so many blends.
After all, when most people first come into contact with purple clay teapots, they think the chemical material looks good. For the sake of sales, this is the only way.
It turns out that Chen Wenzhe and the others used relatively little clay. If Chen Wenzhe purchased it himself, it must be chemical material.
There was nothing he could do about it, because he had no channels to purchase purple clay.
However, Chen Xingchen used to work with him when he was in school.
Therefore, through Chen Xingchen and purchasing goods from the clay factories he knew, naturally he would not buy chemical materials.
At first, he was in Chen Xingchen's favor, but later, as the factory's use of materials increased, Chen Xingchen's voice in the clay factory began to increase.
Since a lot of raw ore materials are needed, the clay factory can only release some of the good materials for purple sand mud.
At this time, Chen Wenzhe did not mind purchasing a batch of top-quality mineral materials to make a batch of truly high-quality products.
Therefore, whether it is clear cement or black star soil, some are added.
The characteristic of black star soil is that there are a little bit of black manganese particles in the mud.
This needs to be distinguished from some clay materials that are heavy in iron content.
The key point to distinguish between the two is to see whether the distribution of particles is uniform.
It's very even and feels relatively restrained because of the blending.
The black dots distributed unevenly and floating on the surface are iron-rich raw mineral mud, not black star soil.
At this time, Chen Wenzhe remembered that the black mud that Zhao Dayong used just now should be black and purple mud.
This involves another kind of mud, purple eggplant mud!
Whether it was black mixed with purple mud or purple eggplant mud, Chen Wenzhe knew it, but this was his first time seeing it.
Purple eggplant mud is a relatively successful type of purple mud. It is purple in color with a hint of red and bluish in it. It is made from purple mud, a small amount of iron red powder, and manganese oxide.
Because after cooking, the outside color is similar to the vegetable eggplant we eat, so it is called purple eggplant puree.
Some people confuse purple eggplant paste and black purple paste with each other because the two are somewhat similar.
Black and purple mud mainly add manganese oxide, so it is purple with black, which is different from purple eggplant mud with purple with red.
Think about it, after all, one is added with iron red powder. Iron red powder is red in color and is mostly used in chemical materials such as vermilion mud, red mud, and low-temperature outer mountain material purple mud (red water).
Among the batches of purple clay purchased by Chen Xingchen, the best one is probably Bottom Trough Green (Qing)!
This kind of mud is also one of the relatively high-quality mineral materials in the purple mud category. It is the name that people hear the most and merchants mention it more frequently.
The bottom trough is green, the mineral layer is relatively deep, and is generally distributed at the bottom of the dark pit (called the bottom trough).
The mud is a bit bluish in color, so it was called green mud in ancient times, and is also called "soap green".
The burial location varies in depth due to geology. Generally, there is output in Well No. 4 and Well No. 5 in Huanglong Mountain.
Of course, Well No. 4 produces the highest quality, and Well No. 4 is the deepest mine so far.
Since there is blue in the bottom groove, there is also green in the middle groove and green in the top groove.
Chen Wenzhe doesn't know much about the green head. It may belong to the category of tender purple mud.
Chen Xingchen bought some medium-tank greens. The firing temperature is slightly lower than the bottom-tank greens, and the texture is more delicate than the bottom material.
The reason why Chen Wenzhe knows this is because of the kiln firing process. Because the materials are different, even if they are all purple clay pots, the firing temperatures are also different.
Generally, the base material firing temperature can be divided into two types: normal temperature and high temperature.
Chen Wenzhe is a master at controlling temperature. Because of the different temperatures, the colors of the fired purple clay pots are also different.
Generally, when firing in Puwen, it will appear brownish red after firing. Some people say it is chocolate color. At this time, there is usually black air. Some people like to say it is the flower mud phenomenon.
Then when the temperature goes up, it will slowly change from brown-red to purple-red. At a certain critical high temperature, it will become deep purple, and then the flower mud phenomenon will disappear.
The longer the mud is stale, the less muddy flowers will appear!
As we all know, one of the characteristics of bottom trough blue is the distribution of blue-green corns on the surface of the ore.
There are corns in the bottom trough green mineral materials, but not all mineral materials with corns are bottom trough green.
It can be said that the bottom tank is actually only a very small part of the inside.
From the size and distribution of the corns, you can tell where the mineral material comes from and whether the bottom tank is clean.
I have never seen this kind of thing and can't explain it clearly.
The corns in the green bottom trough will appear as yellow sand grains after the clay pot is fired.
The pot with a green bottom has a strong sand texture and excellent air permeability. After soaking for a long time, it will have a warm and moist luster, with a spontaneous dark light. It is very simple and elegant, and is a typical mud material among purple sand.
Nowadays, mineral materials have been protected and are no longer mined, and the private reserves previously mined are becoming less and less.
Therefore, as an excellent type in Zini, there are not many in existence, but there is absolutely no saying that it will become extinct.