Xiao Zhang was embarrassed to meet many people, and then left here with his head down.

"Teacher, everyone knows this time, it seems that there are still many people who come with the mentality of watching the excitement. Xiao Zhang said to Tang Qingchuan on the way back.

"Wouldn't that be nice? Tang Qingchuan said indifferently.

"What's good, teacher, if I don't open the kiln in ten hours, it's too embarrassing. Xiao Zhang was really nervous.

Just like what Tang Qingchuan just said, nine out of ten kilns are not successful, and one treasure is out of ten thousand kilns.

In the early stage of Ru kiln firing, it was very good to be able to succeed in one of the ten kilns.

And 10,000 pieces out of a treasure, it is said that there can be a boutique in 10,000 pieces of Ru kiln.

Of course, the modern Ru kiln firing process has gradually improved, which is the point that the predecessors have achieved with sweat.

Just like the mouth of the Baijia kiln, there are at most one or two high-quality products in the firing kiln, and of course, there will be occasional defective products.

The last time I saw it was only a small flaw, and the glaze was stained with dirt.

There are also plain tires that are burned, glaze adhesions, plain tires that are deformed, and burned, which abound.

Xiao Zhang's mind recorded every step of the most correct firing of Ru porcelain.

But who can say for the accident?

And now a lot of people are waiting to see the excitement.

Master Tang Qingchuan, who claims to never accept apprentices, brought inexplicable apprentices to burn porcelain.

This pushed Xiao Zhang to the forefront.

What's more, there is another person's work in this kiln.

The granddaughter of Mr. Su, who is 1.6 meters tall, is 1.5 meters tall Su Yuli.

According to the seniority, hey, not the same generation......

She is a generation older.

Oh my God, what if I get compared to the younger generation?

After coming out of the kiln, the little girl fired better than herself.

Xiao Zhang's thoughts were a little confused.

"Okay, don't think nonsense, it's already burned, just wait for the result, didn't you say before you came just now that you would definitely not embarrass me? Why don't you have confidence now?" Tang Qingchuan Education Xiao Zhang.

Xiao Zhang scratched the back of his head and sighed.

"Don't sigh, come back with me and get the glaze ready. Until now, Tang Qingchuan has not forgotten the next step.

"Teacher, if this plain tire is not burned well, isn't this glaze in vain?" Xiao Zhang said strangely.

"What is this called? Today, you are asked to burn the whole process of Ru porcelain, not only for the final product, but also for failure? If you burn very well and become a blockbuster, what else can the teacher teach you? Only when you go down every step can I know where your weaknesses are, and each step is continuous together, even if it is one thing and several things, do you understand?" Tang Qingchuan continued to educate Xiao Zhang.

Xiao Zhang hurriedly nodded to indicate that he understood.

It's strange to say that this student always wants to be the best, even if the teacher doesn't teach anything, he has to do his best, as if the teacher will be happy.

But what a real teacher hopes is to be able to find out the student's shortcomings, correct them in time, and take a step forward, it doesn't matter what the result is, and it doesn't matter if you can hand in the perfect homework.

Soon, Xiao Zhang and Tang Qingchuan returned to their previous room.

Xiao Zhang picked up the glaze that had been blended.

As a professional Ru porcelain master, you must be familiar with every step of Ru porcelain production, and this first step should be to knead the mud, but there is just a ready-made mud ball, but this glaze is a very critical step in all the steps of firing Ru porcelain, you must master. Tang Qingchuan reminded in due course.

Xiao Zhang nodded, picked up the grinding rod and began to stir and grind continuously.

"Xiao Zhang, do you know why this Ru porcelain needs agate glaze?" Tang Qingchuan asked when he saw that Xiao Zhang was taking this step.

Xiao Zhang thought about it, and he really had a memory in his mind about the agate glaze.

"Back to the teacher's words, agate glaze and Ru porcelain azure color is related, first, the main thing is that the northern glaze firing temperature is high, the high firing temperature will lead to the color of the porcelain fetus, which is not conducive to obtaining azure, but the agate will improve this situation after the glaze, the main component of agate is silicon dioxide, agate glazing can increase the content of silicon in the glaze, while reducing the proportion of aluminum, reducing the firing temperature of the glaze, but also can restrict the color of the porcelain fetus, more conducive to obtaining azure. Xiao Zhang said with a smile.

Tang Qingchuan nodded and said: "This is one point, and another point is that the enamel of Ru porcelain is a typical lime glaze, and the content of calcium oxide in the glaze of co-solvent reaches about 15%, and at high temperature, it is easy to fire into a vitreous glaze, and it does not have the quality of milky jade, besides, the iron oxide content in Ru porcelain glaze is as high as 2% Above, in the high-temperature reducing atmosphere, the ionic iron is abundant, the glaze is fully melted, and only the blue-green vitreous glaze can be obtained, and the jade texture of azure opacity can not come out, and the Ru glaze with agate is added, which reduces the firing temperature of the glaze, which is conducive to obtaining the emulsion jade texture enamel. ”

Xiao Zhang didn't know this, what Tang Qingchuan said was about to catch up with a chemistry professor.

It seems that I still don't have enough knowledge in my head.

"Teacher, I see. Xiao Zhang nodded hurriedly, and at the same time grinded the glaze, and began to add water to the glaze.

"No, you don't understand. Tang Qingchuan said.

"Teacher, I really get it. Xiao Zhang continued to laugh.

"No, I said you don't understand, you just don't understand. ”

"Isn't it that adding agate can reduce the temperature of the glaze, in addition to being able to burn the azure color, you can also get a milky jade glaze instead of glass glaze!" Xiao Zhang quickly summarized what Tang Qingchuan said just now, what did he not understand.

"Alas, you don't understand that you are still strong, there is a third reason why this agate is glazed, do you understand?" Tang Qingchuan asked with a blank face.

"This ......" Xiao Zhang surrendered.

"The third point, that is, Ru porcelain glaze with agate, not only reduce the firing temperature, can control the kiln temperature at 1180 to 1280 degrees, but also restrict the depth of the tire color, more importantly, this temperature promotes the crystallization of Ru porcelain glaze, that is, the success of the phase glaze, the so-called crystallization is actually through the control of the temperature in the kiln, promote the carcass and the crystal molecules in the glaze to continue to move, tumbling from bottom to top, so that the crystal shape from the point of flowering, this process is exactly the same as the natural stone texture of the generation of the law, the sense of hierarchy is very rich and changeable, random distribution, and natural jade is indistinguishable, which is also the reason why Ru porcelain is like jade and non-jade is better than jade。 Tang Qingchuan said arrogantly, with a face full of unconvinced.

"Teacher, the disciple knows, does the teacher have a fourth point?" Xiao Zhang learned smartly this time, and Tang Qingchuan's speaking rules have mastered a little.

Just now, I was taught another lesson by the teacher.

In other words, is the teacher a physics professor or a geography professor incarnated in this third point?