Li Yi smiled slightly, but did not speak, and said in his heart, making those optical glasses is not so simple. Although optical glass can be made with high-purity quartz sand, the effect is not the best.

The best optical glasses are borosilicate glass and phosphate glass, which are very complex to make and go through a lot of chemical reactions, which are difficult to achieve under the current conditions. So quartz glass can only be the best choice at the moment.

Li Yi inspected the equipment for making glass in Liulifang in detail and the perfection of the entire production process, and soon found many existing problems.

First, the crushing and screening of quartz sand is very non-standardized, the crushing effect is not good, the size is different, and the particles are uneven, which brings certain difficulties to leaching and melting.

Second, the temperature of the crucible kiln cannot be kept constant during melting, and the fired glass solution cannot reach the best state.

Third, the stirring is not uniform enough, and the stirring time is not up to the requirements, so that the internal bubbles cannot completely escape.

Fourth, the design of the leaching tank is not standardized enough, resulting in unsatisfactory quartz sand leaching effect.

Fifth, the equipment for the glass solution does not meet the requirements, and the solution contains impurities, making it difficult to make high-quality glass.

Li Yi's professional analysis and guidance suddenly made Lin Qingliang admire the five-body throw, although Li Yi himself is also half a bottle of vinegar, these so-called points have not been actually verified, but just the throwing of these ideas is enough to shock Lin Qingliang.

The two of them fully demonstrated and studied the production process and process, discussed some details of improvement, and were about to start the actual verification, but a personal soldier came to report, saying that the Great Yi Ningguo sent an envoy, that is, Xun Zaluo, who often travels between the two places, with only two entourages, is now waiting outside Pingyang Pass to receive him. Master Lin asked him to come and ask for instructions on whether he was allowed to enter the gate.

Hearing the news, Li Yi couldn't help but wonder secretly. There has just been a big war between the two countries, and they have already torn their faces and become mortal opponents, and it should be said that there is no love at all.

I hadn't sent anyone to condemn them, accuse them of treachery, but they came to the door of their own accord. He came this time, and he didn't know what mission he had come with him, and if he flatly refused to see him, it seemed that he was not atmospheric enough.

Alas! After thinking about it, even if it doesn't matter if you see him once, you have to see how he can explain his treacherous attack on Yunnan in the righteousness of Ningguo.

But he can't let him see him as soon as he wants, after all, this Liulifang himself has to work here for a while, and he doesn't know when he will get it! How can you have time to give him this face, just let him wait in the hotel first!

Thinking of this, he personally issued a warrant and instructed the personal soldier to report back to Lin Yi and ask him to arrange for Xun Zaluo to rest in the hotel first, and then meet him tomorrow morning.

After arranging this matter, Li Yi and Lin Qingliang devoted themselves to the work of transforming the manufacturing process and process of colored glass. The importance of the process of screening, crushing and re-screening is determined, and the screen that meets the specifications is selected for two screenings, and the mentality of taking all the size and indifference must be resolutely eliminated, and the particles must be uniform. In addition, the crushing must use an iron mill with appropriate weight to ensure that the crushed particles basically meet the requirements.

Increase manpower, and carry out the necessary training, fully consider the requirements of large-scale production in the future, rebuild the leaching mixing tank that can accommodate a sufficient number of quartz sand particles, effectively improve the production capacity of glaze, and meet the ability to produce various types of glazed products.

Li Yi drew the drawings of the crucible kiln by himself, although he was not an expert, but he had seen such a thing as a crucible kiln. Therefore, with the help of memory, it was simply drawn, and Lin Qingliang was asked to optimize the structure according to the drawings he had drawn, verify it in many ways, and build two crucible kilns with strong ventilation capacity and the best furnace temperature, so as to create favorable conditions for the production of qualified glazed products.

In the two screening processes of quartz sand, the iron contained in quartz sand is the most difficult to remove. If you can use chemical methods to precipitate iron, of course, it is the best, but in this era there is no such condition, you can only use two huge magnets, and use manual sorting methods to eliminate the existence of iron as much as possible, although the effect is not very good, but it is finally better than nothing.

The other is the tin tank where the melted glazed water is stored. Since the glazed water does not react chemically with tin, it is the best choice to store the glazed water at a certain temperature in a tin bath. Because there were already many tin products in this era, it was not very difficult to build a tin tank.

So after Li Yi said his idea, Lin Qingliang immediately agreed, promising to build the tin tank within a few days at the latest.

The most difficult thing to control and grasp is the production process. Processes such as preheating, melting, filtration, cooling and cooling, annealing, quenching, and molding, although Lin Qingliang has basically mastered them, it is not so easy to grasp the heat.

In this era, there are no automated machinery and equipment, and it all depends on human observation and judgment, and experience is the most important. Only after a large number of experimental processes can the entire production process be fully mastered, so the difficulty is definitely not small.

After Li Yi's long-term guidance and help, Lin Qingliang has a deeper understanding of glass production. That is, in order to produce qualified glass products, the production equipment must meet certain standards, and the process must also meet the requirements, which is a hard and fast rule, otherwise, the tiger is not an anti-dog, and the specious glass products can not attract customers, nor can they bring rich benefits.

I was busy in Jiuxiang for almost a whole day, inspecting the equipment back and forth, drawing drawings with all my might, carefully straightening out the process flow, and carefully discussing the equipment transformation method.

It wasn't until the sky was completely dark that Li Yi and Lin Qingliang couldn't stop their efforts, after all, Rome was not built in a day, and Li Yi didn't have a chance to come over to help in the next few days, so he could only rely on Lin Qingliang to figure it out by himself. After carefully explaining and instructing Lin Qingliang again, Li Yi rushed back to the Xuanfu Embassy with Lian Jun and others.

Early the next morning, Li Yi had just gotten up and finished exercising in the courtyard, when his own soldiers came to report that Xun Zaluo, the envoy of the Great Yi Ning State, was already waiting in the gatehouse to receive him.

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