Allen's efficiency is very fast, or the allure of three gold coins is too great, and in the time that Duke is just taking a nap, Allen has already brought a dozen people to the castle.

These are the potters that Duke urgently needs at the moment, the world, like the European Middle Ages, has actually touched the threshold of porcelain, but because the kiln temperature is not enough and they do not realize the importance of kaolin, they can only burn rough pottery, not fine porcelain.

Duke didn't plan to burn the beautiful porcelain of ancient times such as the official kiln or Jingdezhen, after all, he was engaged in copycats. But as long as the average porcelain level is fired, absolutely every kiln is a gold mine, and these pottery craftsmen in front of him are the key to his success!

When the group of potters saw Duke coming out, they all bowed and saluted, and a middle-aged man at the head of them took a step forward and said, "Honorable lord, I am Abner, the owner of the pottery shop in the city, these are my workers and apprentices, do you recruit us to burn pottery?"

"No, I'm asking you to make porcelain!"

Hearing Duke say this, Abner's face was full of surprise, and then he said in a panicked tone: "I'm sorry lord, we can't burn porcelain, this is the skill of the Cyris Empire, and no one in the continent of Europa can." ”

"It's okay, you just need to use the clay I gave you to make a clay embryo like the Ceris porcelain, and I'll tell you the rest. ”

Hearing Duke say that as long as they fabricate clay embryos, these potters breathed a sigh of relief, and this kind of thing was not difficult for them.

"You go to the open space in the back garden of the castle to build the kiln, remember to build it with your most fire-resistant and high-temperature masonry, as long as you can build it, any requirements and materials, you can ask me. When Duke had finished speaking, he called a valet from the castle and took the potters to the back garden for preliminary preparations.

After dealing with the pottery craftsman's business, Duke came to Allen's side and whispered to him, "Find a team from the City Lord's Guard that is absolutely reliable, and dig up the white dirt from Mont Saint-Michel to the east of Stormcastle." Remember, try not to let unrelated people know about your actions. ”

"Is this the clay from which the porcelain is fired?" Alan finally asked.

"That's right, this is the clay that makes porcelain!"

Duke has not hidden, and through these days of contact, Alan has proven himself to be reliable. In addition, this kind of thing cannot be completely hidden, and historically Europe also imitated porcelain in the 17th century, and what Duke had to do was to delay the diffusion time as much as possible and make more profits before others copied it.

The white clay of Mont Saint-Michel is actually kaolin, which is very suitable for porcelain and refractory materials. When he was making porcelain in the handicraft class, Duke remembered the raw materials very clearly, and it just so happened that in this body, he also had the memory of the white clay of Mont Saint-Michel, and the temperature and kaolin, the two key points of porcelain, were solved first.

Taking advantage of the time to build the kiln and dig the kaolin, Duke slept well again, he had really used his brain a little too much in the past two days, and he was simply oppressing his potential.

The construction of the kiln was relatively fast, not to be precise, it was not to rebuild, but to dismantle the previous pottery factory and rebuild it using existing materials. The only difference is that the kiln has been slightly modified by Duke, and the flat kiln has been transformed into a sealed inverted flame kiln.

The principle of the inverted flame kiln is not complicated, the simplest explanation is to seal the outlet of the flame, let the flame turn back to raise the temperature in the kiln, as if the flame is from top to bottom, which is also the origin of the word "pour".

Kilns with this principle have a history of thousands of years in ancient China, and are also known as bell kilns, egg-shaped kilns, and so on. In fact, the development of many technologies is almost a foot in the door, and as soon as Duke said the general construction method of the inverted flame kiln, these pottery craftsmen quickly understood.

But Duke was not too excited, because he knew that these were just the basics, and the real difficulty was the temperature and the firing process! In addition to using an inverted flame kiln, the combustible material was also a key point.

Duke didn't even plan to use charcoal, because he knew that he would definitely lose a lot of heat if he remodeled the inverted flame kiln roughly, and he had to use higher heat combustibles. The only material that can be easily obtained in nature is coke.

Fortunately, there is no shortage of coal in Storm Fort, just like burning charcoal, which can be easily obtained by smoldering. Coupled with the time it took for the potters to fabricate the clay embryos, it was already three days after the entire preparation was completed.

In the past few days, Princess Ji Na came to the back garden when she was fine, and she felt incredible when she saw that the construction was in full swing here, and what kind of porcelain was being fired.

As the royal princess of the French Empire, Ji Na naturally understands the preciousness of porcelain and the difficulty of firing porcelain. It can be said that on the continent of Europa, there have been countless alchemists who have wanted to create this miracle for hundreds of years.

The most famous is the Milan Empire's Fra Alchemy Laboratory "porcelain firing" attempt, in order to obtain the same smooth and gorgeous porcelain as porcelain, they added sand, glass, crystal and other materials to the clay to fire the glaze transparent Seris porcelain, but the result was a failure. Even if it is barely fired, the finished product is miserable, not only the glaze is cloudy but also has a large number of bubbles.

What these magical alchemists can't do, can Duke do it without learning and not knowing how to do it? Jina couldn't believe it, but she looked at Duke as if he was commanding, and these ceramic craftsmen also admired the young lord very much, and felt that this straw bag seemed to be a bit of real material.

"Are you really firing Ceris porcelain?"

Princess Gina walked over to Duke and asked again.

"Your Royal Highness Princess, I have answered you countless times, I am not here to burn porcelain, am I playing with mud here?"

Duke has been devastated by this curious baby princess these days, although the poisonous tongue and willfulness are a little better, but it is still as annoying as ever!

"But at your level of straw bales, can you burn it?"

"You can rest assured of this, I will definitely burn a vase for you. ”

"Viscount Duke, you're looking for death!"

Princess Jina's coquettish words made a gesture with a plan to make a move, and Duke was also well aware of Jina's actions, and he had already flashed to the side. And the craftsmen and soldiers of the city lord's guard who saw this scene also changed from initial shock to habit, after all, this world does not want to have strict etiquette like ancient China, and the status of women, especially noble women, is still quite high.