On the other side, Shi Da began to organize workers to put new utensils into the kiln.

Then use hay and coking coal, stack them layer by layer, and light the fire.

The role of hay is to help the coking coal burn more fully, and then a long wooden pole plastered with mud can be used to poke through the hole to control the amount of oxygen and adjust the flame structure.

This is especially important. For example, the glaze prepared with copper oxide appears green during the oxidation flame, but appears red during the reduction flame. The difference is huge.

The glaze color of Jun kiln is rich in changes, because the kiln workers change the composition of the flame during the firing process, forcing the kiln to change, and firing the glaze color with gorgeous and rich colors.

But this is the next step. Now we need to use the high temperature of coking coal to burn the real bone china porcelain embryo.

Suyou is not as good as Shidong in repairing Gao Yuanyuan, and the ones he chooses are all small and medium-sized mud embryos.

Foreman Shi Dahe looked at the situation inside the kiln through the kiln eye, and couldn't help but feel a little frightened. The color and flow of the fire were uniform and stable, and the temperature was extremely high, just like the legendary Laojun furnace.

Real experts care about these things.

When the firing was completed and the sagger was opened, Shi Dongxiu could not open his eyes because of the crystal-white objects.

This quality is a huge step up from the porcelain plate Cheng Wenying just took away.

Different functions require different firing methods. What porcelain plates need is to control the error of each plate to a minimum. If we use this new firing method, a considerable degree of vitrification will occur inside the porcelain clay, which will definitely cause the shrinkage ratio of the porcelain plate to greatly increase, and thus

leading to huge errors.

But now, the fine glass structure sintered within the porcelain clay has brought a shiny appearance to the new porcelain.

Shi Dongxiu held a cup as if it were a rare treasure: "What bone china? It's so unpleasant! Jade porcelain! This is jade porcelain! From now on it will be called jade porcelain!"

Shi Da began to secretly slander again, you have the nerve to snatch the naming rights, this should be the right of the young gentleman.

Su You didn't take it seriously: "Okay! Shi Shibo has obtained good jade porcelain, which is more elegant than bone china and bone ash porcelain."

Shi Dongxiu chuckled and said: "My dear nephew, I got carried away for a moment and forgot the rules..."

Su You said nonchalantly: "The name is already good, but to truly deserve the title of jade porcelain, we have to wait until it is glazed and refired."

Shi Da patted his chest: "No problem. With the young master's advice, firing a thin layer of glaze is much less difficult than sintering the carcass. Shi Da promises to do it well."

Su You said: "Shi Da, today we will solve the problem of too thick glaze. In this way, for bottles and other things, you first apply the inner glaze. The process requirements are not high. As for the thin outer glaze, there are also pots and bowls.

, when I left the city, I customized a few things at the blacksmith shop next to the city gate. You can send someone to get them. Only with those things can we really solve the problem of glazing."

At this time, Ba Niang and Twenty-Seven Niang came over to greet everyone to dinner.

In the Song Dynasty, ordinary citizens had two meals a day, while wealthy people had three meals a day, sometimes with midnight snacks.

Soybean is added to Kelong three times a day. Even if each meal is not much, it is very delicate and every meal is indispensable.

This is also the reason why the old man often scolds him, poor life and rich body, eating the old man to death!

The atmosphere in Meishan has changed, and it seems that everyone here feels that if he does not eat three meals a day, he will be sorry.

Even the craftsmen in the workshop benefited from it.

After lunch, the things were delivered.

This thing is very strange in the eyes of Song people. It is a T-shaped copper pipe.

If you look carefully, you will see that there are actually two pipes. One is curved with a hole in the bend, and the other is inserted through the hole, and the two pipes are put together.

Behind the straight pipe is a pump.

Su You took the pipe and checked the joints and gaps at the connections.

The copper pipe is made by wrapping red-hot copper sheet diagonally on an iron bar and hammering it. The Huangyadong Arsenal once used this method to process steel gun barrels. It seems that the wisdom of the craftsmen in the Song Dynasty cannot be underestimated.

Then the interconnection between the copper tubes is directly sealed with glue, and the chisel-mauling process is used between the pump cylinder and the copper tube.

The combination is so tight that ordinary coppersmiths and blacksmiths cannot do this craftsmanship.

Punch a cork, insert it into the copper pipe at the bottom, fill a porcelain bottle with oil, plug the cork, and you will get a spray gun.

There should also be an air inlet hole on the cork to ensure that low pressure does not occur in the bottle.

The principle of the spray gun is Bernoulli's principle. The high-speed airflow in the inner tube will cause the pressure on the inner and outer tube walls to decrease, thus forming a pressure difference with the inside of the pot, causing the liquid in the pot to be sucked out and then torn into fine mist-like water droplets by the high-speed airflow.

.

The copper tube is very thin and the pump moves very slowly. Not much glaze can be sprayed out per unit time, but it lasts a long time.

Put the porcelain body that had been glazed by Shi Dadang on the turntable, and soon a uniform and thin glaze layer was sprayed on.

This method of glazing is definitely unique to the Song Dynasty.

After waiting for the glaze to dry, it was sent to the sagger and the combustion chamber was filled again with straw and coke. Near evening, a new kiln of porcelain was fired again.

The porcelain inside the sagger is crystal clear, flawless and extremely solid. It is no exaggeration to call it "jade porcelain".

There are not many things that can be fired at a time in the small kiln, sixteen small bowls, eight plates, two vases, and eight small wine glasses. Below one is a small conical wine horn with an open top.

This set of white jade porcelain came to the world for the first time, and everyone was shocked and speechless.

Shi Dongxiu reached for a plate in the pottery bowl with trembling hands, but he couldn't muster the courage to take it out of the sagger.

After struggling a few times with trembling hands, she stamped her feet anxiously and shouted to Twenty-seventh Mother: "You should take it out quickly and show it to daddy! This daughter! She doesn't even wink at all!"

Twenty-seventh mother herself still felt a little weak in her legs: "Shi Da! Shi Da!"

Shi Da is valuing the porcelain from this kiln. People in the Song Dynasty love to search for rare things. A very fine whetstone can be sold for several thousand dollars a piece.

Well, things are rare and valuable. This is the first thing that appears in the world. A small bowl with three strings, a plate with five strings, two vases with a total of twenty strings, and wine sets...

One kiln is the base of hundreds of coins!

Porcelain rooster, this one makes a lot of money!

Hearing the twenty-seventh mother calling him, Shi Da quickly took out the porcelain from the kiln bowl, washed it, and placed it on the table.

Shi Dongxiu looked at this, touched that, carefully picked up the plate and tapped it lightly with his fingers, then picked up the plate and pointed it at the sun.

Su You felt in a daze that his eyes under the setting sun were filled with real golden light.

I couldn't stand it anymore! Su You found a box and put the small wine glass and the corner in it: "Banniang, let's go home. We promised to get a set of good wine utensils for my uncle-in-law, and we finally kept our promise."

When I got home, I saw Cheng Wenying sitting on a chair with a silly smile, and a picture of Guanyin hanging opposite him.

The thin black lines are like fine brush strokes, and the layout is very accurate. The azure color of the rocks on the ground, together with the black of the stones on the bottom of the previous ink plate, create a chaffing effect. Guanyin's skin is flesh-colored, and the bamboo leaves and lotus leaves are emerald green.

The red goldfish and lotus are designed very cleverly. The tails and petals are excessively red and white through the use of wires and large hollows. At first glance, they look almost like gongbi.

Su You took a look: "It's amazing! Yu Gong's craftsmanship is really impressive..."

Cheng Wenying turned around and saw Su You: "Good nephew, is it possible for Lao Shi to do it?"

Su You smiled and said: "So that my brother-in-law will know that Ba Niang has gone to the kitchen to prepare. I will definitely give you a surprise later."

After a while, Ba Niang came up with a food tray, which contained a braised food platter, a white jade wine horn, and a set of cups that only held four coins.

Ba Niang put the wine and food on the cloth: "Grandpa, this is the porcelain that Uncle Yao made today. Although this dish of braised meat is also Uncle Yao's recipe, it was cooked by Ba Niang herself. Ba Niang spent these hours, so that

Grandpa is worried."

Cheng Wenying smiled and said: "Good boy, you are doing it for your family, but from now on, you can no longer hide these things. You see, if you tell your nephew, won't the matter be solved easily?"

After speaking, he picked up a cup and looked at it: "It is fine and hard white, comparable to high-grade white jade."

Su You smiled and said: "Yes, Shi Shibo thought that bone china was too ugly, so he gave it a new name, 'Jade Porcelain'."

Cheng Wenying said bitterly: "This old man dares to take away the right to name my nephew!"

After saying that, he said awkwardly: "Well, good nephew, it seems that this name given by Shi Lao'er is indeed more elegant than that of bone china..."

Su You smiled and said: "Choose the good ones and follow them. I have no objection at all."
Chapter completed!