When the wooden board was propped up on a shelf, Xia Yanqing clearly saw the blankness on the faces of the seven people present.

Guan Yunsheng's dazedness was a little lighter than the others. Shopkeeper Kang gave him a message that he needed to prepare such a plank and a wooden frame. At that time, he had also made guesses, but in view of his short-sightedness, he did not have the thousand-year-old accumulation like Xia Yanqing, and he did not guess what such a wooden board could be used for.

At this time, Xia Yanqing asked to support the wooden plank, and Guan Yunsheng took it for granted that this thing must be related to the continuous feeding glass technology. As for where the connection is, then I don't know.

Xia Yanqing saw everyone's reaction, but this kind of thing doesn't need to be explained, as long as it is used, it is more useful than any kind of explanation.

And she didn't think too much about the popularity of blackboards.

In ancient times, this teaching method was mainly to read, endorse, and explain, unlike mathematics, physics, and chemistry, which needed to explain arithmetic, equations, diagrams, etc., and there was no need to popularize it at all.

It's just that what she wants to say now is that she needs to use the blackboard to assist in order to explain her thoughts simply and clearly.

Xia Yanqing didn't ask to make the living room like a classroom, but just instructed the two young men to prop up the wooden plank on the side of the living room so that everyone could see it.

Watching the two young men retreat, Xia Yanqing began to explain: "You should all know that today we are talking about continuous feeding glass technology. ”

She stood in front of the wooden board, turned around and used the thick carbon strip in her hand to write the words "continuous feeding" on the board.

After writing it, I asked in hindsight: "The people we are here are all trustworthy, right?" ”

Everyone was still immersed in the role of this plank, and they didn't expect that this Xia family girl would actually explain in this way.

The most experienced are Guan Xiao and Guan Tong. I think that at the beginning, when my husband gave them lectures, they all recognized them word by word with books and notebooks in their hands.

If there had been such a thing at that time, and the gentleman had written down what the boys were going to learn on a wooden board, would it be easier for everyone to accept it?

Others have been away from the academy for a long time, and these experiences are less, but they are also very new to this way of explanation. At this time, I was suddenly asked such a sentence, and I was stunned.

Qu Jiang looked at the people in the room. The three generations of the Guan family, of course, are their own people, and the two maids standing on the side are also serving Xia Yanqing closely, anyway, every time he visits the Qingyun Zhai kiln, no matter what he says, these two maids don't have to avoid it, they are naturally trustworthy.

The rest was only an official and a craftsman he had brought in.

Guan Benhe would let Qu Jiang open this mouth first, even if he knew that Xia Yanqing's main question was about the three who would be the prisoners, he would have to make a show, "Miss Xia, don't worry, my two grandchildren are the heads of the Guan family since childhood, and they are as reliable as the old father and son." ”

Qu Jiang coughed dryly and said, "The two people brought by this official are both key figures in the development of glass technology, and they can be trusted. ”

Xia Yanqing didn't think it was inappropriate for her to ask, such an important matter always had to be prevented. Getting reassurance from the other two parties involved is foolproof.

"That's good, now the outside world knows that the improvement of glass technology should start with continuous feeding. Now that the general direction is there, the rest will have to work the details. What we are talking about today is the details, if we are accidentally known by others today, combined with people's own ideas, we can't say, our technology development will fall behind. At that time, there was no profit to speak of. ”

After saying these words, the faces of everyone present became solemn. The three parties involved in the development of glass technology are all waiting to make a profit through glass technology.

Needless to say, the Guan family and Qingyun Zhai are related to their own money, and they must be cautious about secrecy.

Qujiang and the three are the same, although the income from glass technology is not their own silver. But they are in the prison, unlike other folk workshops, it is related to the affairs of the palace, and secrecy is almost a subconscious quality.

Now although this matter has nothing to do with the palace, it is the income of the treasury that the emperor is worried about, and he doesn't dare to let the chachi appear here at all.

Qu Jiang knew that Xia Yanqing had very surprising ideas from time to time in many things, and was full of expectations for what she would tell next.

Although the rest of the people have expectations, they are also a little skeptical that Xia Yanqing, a woman, can have an unexpected way in a matter that has not yet been developed.

"In our vision, continuous feeding means continuous discharging, so continuous output not only saves the time of feeding heating, cooling, and production of dry pots. At the same time, it also reduces the heat loss of intermittent discharge, so that the crucible can always be kept at the high temperature state of molten glass melting. ”

Xia Yanqing said as he listed the process and time spent on the two kinds of feeding, as well as the heat loss between heating and cooling.

In the comparison between the two hatchbacks, the advantages of continuous feeding are extremely eye-catching.

What Xia Yanqing said, Qu Jiang and others had also vaguely thought about it, but they didn't sort it out so clearly. But it was also expected by them, although they nodded frequently at this time, there was not much surprise.

The four members of the Guan family are different. Their knowledge of glass making was only seen when they visited the Qingyunzhai kiln that day.

At this time, I listened to Xia Yanqing's narration, and recalled the glass production site I saw that day, if I could really heat up after feeding, and after the raw materials melted, and then cool down the glass liquid to an operable state, and the time of the crucible kiln occupied by the long production process, the output of glass would inevitably increase significantly.

Between heating and cooling, the amount of firewood consumed will be greatly reduced.

Thinking that after the success of this technology, the output of glass will increase dramatically, the cost will be greatly reduced, and flat glass and various glassware will surely enter thousands of households. How many shipments will there be? And how much will it gain?

Guan Benhe and Guan Yunsheng's hearts warmed up.

Qu Jiang is still calmer, in addition to what he knows, there are also those problems that haunt his heart that cannot be solved.

"But the frit in your crucible always has to come out. Is it possible to make a crucible into a movable one, and pour it out when the molten glass has melted? Qu Jiang asked.

"This is the pond kiln technology we are going to talk about next." Xia Yanqing said, turned around and drew a simple narrow brick pool on the wooden board.

Then, while dividing the pool, he said, "The first part can be conceived as the current crucible kiln, where the raw glass will be fully heated......