Yang Wenli only knows the formula ingredients and firing process principles of bone china, and has never fired bone china, to put it bluntly, he is just a theoretical school.

The recipe of bone china was made public in later generations, but only a few developed countries could fire bone china, which shows that bone china is extremely difficult to fire.

However, Yang Wenli also wants to give it a try, if he masters the art of burning bone china, it is definitely a profiteering product, and he can make a lot of money by inheriting it for hundreds of years.

It can be said that with a skill in hand, the prosperity of the family inheritance is guaranteed. The confusion is so great, Yang Wenli wants to give it a try even if he smashes the pot and sells iron.

Later generations recognized that the best formula is 50% beef bone meal, 25% porcelain stone, and 25% clay, but Yang Wenli can't do it, at least he can't do it with beef bone meal, a small amount of experiments is no problem, where does industrial mass production make him find so much beef bone meal?

There is also a low proportion of clay, which is easy to burn, which increases the difficulty of firing, so the proportion of clay must be increased to about 40%, which is nothing more than a thicker tire and does not affect the appearance of the device.

In fact, the main content of beef bone meal is calcium oxide, so it should be possible to replace it with other things rich in calcium carbonate, although I haven't tried it, but Yang Wenli has to try it, because he doesn't have beef bone meal.

Shells are rich in calcium carbonate in nature, which are almost equal to calcium carbonate and are the most ideal alternative to beef bone meal. (Note: Calcium carbonate is calcined as calcium oxide)

Although other feldspar and quartz sand are also scarce, they can still be bought, and the most important thing is that they are not controlled by the court, as long as there is money, no one cares how much they buy.

It took Yang Wenli two months just to prepare the materials, and the fact that feldspar and quartz sand are extremely difficult to buy is one reason, and the layer of colored things on the surface of the shell is also time-consuming to scrape off. There are also feldspar and quartz sand, which he also cleans and selects, and only selects the purest part of the material.

If you want to do it, you will do the best, this is Yang Wenli's seat inscription, he is a more serious person, so he is naturally suitable for scientific research.

To what extent is Yang Wenli's more seriousness? It can be said that everything is used. Let's talk about the drying room! In order to prevent dust from getting on the tires, he built an ancient version of a clean room.

Don't look at the beautiful mountains and rivers in the countryside, but in fact, the dust content in the air is relatively large, and there is a large amount of bare land on the surface of the countryside, as long as the wind blows, it is normal for the dust content in the air to be large. At this point, the countryside is not as good as the city, I don't believe you can wear a white shirt to the countryside and the city to try it separately. Yang Wenli was a farmer in his previous life, so he was well aware of the shortcomings of the countryside.

In ancient times, there was no ventilation and dust removal equipment in the clean room, so it was simply completely sealed. Tile roofs are not OK and must be sealed with suspended ceilings, because the tiles do not prevent dust from drifting into the room, the walls are white, the floors are paved with wooden planks, and there are no windows.

The hardware can only do this, after it is built, use a clean wet towel, wipe it constantly, and after a few times, until the white towel can still keep the snow white after wiping the floor, it is basically qualified.

Yang Wenli, who is more serious, also thought of a way to remove trace amounts of floating dust in the air, to put it bluntly, it is electrostatic precipitator technology. Rubbing the surface of clothing or fabric vigorously can generate static electricity, which is the most likely to attract dust.

In this way, Yang Wenli tried his best to finally build an ancient version of a clean room. At that time, there was no blowing and dusting equipment, and it was definitely not possible to open the door to the clean room, so Yang Wenli was actually a combination of two secret rooms, and the outer secret room was often wiped with dust, as a changing room and a blowing dust room. There was no way, the conditions were limited, he could only do this.

The furnace is still the same reverberatory furnace that was used to make iron, and it still uses charcoal. Yang Wenli will not build a kiln dedicated to porcelain burning, but porcelain burning is ultimately a matter of temperature.

There is no problem with making porcelain in a furnace that can make steel. The steelmaking temperature exceeds 2000 degrees, that is, the ironmaking temperature exceeds 1650 degrees, far exceeding the firing temperature of bone china by 1250 degrees. The higher the temperature, the better the sintering of the porcelain, and Yang Wenli believes that there is nothing wrong with the furnace.

Easier said than done, during the experimental firing, problems arose. Yang Wenli learned a lesson, the temperature is not high, porcelain is fragile.

In particular, the shrinkage rate of bone china is quite large, and if the temperature is a little higher, it will simply be all shattered, and there will be no finished product.

Without a thermometer, there is only a lot of experimentation. Continuously reduce the furnace temperature until the plain tire is no longer broken, and then see whether the plain tire is sintered intact.

The way to distinguish is very simple, just take two sintered plain tires and knock them on each other. Bone china has excellent texture, thin tires, and impact resistance, more than three times that of ordinary porcelain.

Because of the thin tire, bone china has a great shrinkage when firing.

Of course, it is not as simple as a two-sentence introduction, for example, after the plain tire is fired, it cannot be immediately out of the kiln, and it must be cooled down slowly, otherwise it will definitely break. These are the experiences that Yang Wenli has gained in his experiments.

Bone china firing has to go through two processes, first burn the plain tire, then burn the glaze tire, especially the glaze on the plain tire, in the process of air drying, it must not be contaminated with dust, otherwise the glaze is not pure, and the crystal clear effect cannot be achieved, which is why Yang Wenli wants to build a dust-free tire drying room.

In addition, tire manufacturing must also find a way to overcome difficulties. As I just said, the bone china carcass is very thin, and it is difficult to maintain a beautiful and symmetrical shape, no matter how good the handiwork is.

Yang Wenli's method is to use a wooden roller instead of a hand, and the shape of the exterior is determined by the shape of the porcelain vessel. The two wooden rollers inside and outside are fixed, which is much more stable than the hand, so it can make thinner porcelain tires.

It seems easy to say, but in fact, Yang Wenli has gone through countless difficulties, and if he really wants to make it clear, he can't finish it in a month. For example, the maturity of kneading porcelain clay, dry humidity, etc., he has never made porcelain before, and all of them have to be experimented with himself, and the difficulty can be imagined.

Scientific research has never been achieved overnight, and if you don't go through 9981 difficulties, don't think about success. In short, Yang Wenli will not think about firing bone china for a while.

……

"Do you know why you keep missing? The main thing is that your hands are still unstable. The hand is not steady, it is not that you keep holding the bow and arrow to aim before firing, but at the moment before launching, the angle of elevation and the offset must be correct.

Let me show you, how do you see me? Think again, how can you do what I do? ”

Porcelain burning is also porcelain burning, Yang Wenli will still check the shooting level of the young family members from time to time, correct their mistakes from time to time, and demonstrate in person, in the hope that they can reach the level of the archer as soon as possible.

"Bah" Yang Wenli's arrow hit the red heart again, he almost didn't aim much, it seemed to be a random arrow, but he just hit the red heart.

"Bang Bang!" "The young master is so good"......

The teenagers applauded excitedly one by one, they were both envious and expectant, thinking that they would be able to do such a foolish arrow as the young master in the future, their faces were flushed with excitement.

…… To be continued