At this time, Mr. Zhao shouted to the onlookers, let's disperse, let's disperse, if everyone is interested, it's too late to go back to the Red Mansion for lunch and come again......

Six hours later, in the anticipation of the onlookers, the steel film finally opened, and the first glass product to take shape was a ---- transparent cup! It's completely transparent!

At the production site, including the onlookers eating melons, all the people cheered......

Of course, the trial production of the glass factory is far from over.

In the evening of the same day, the anxious members of the chemical team began to work overtime to adjust several single-arm bottle making machines, and then immediately began trial operation.

Then, the furnace was turned on again, and in the middle of the night, several more glass bottles were produced.

However, it is somewhat disappointing that although the shape of the glass bottle is basically acceptable, the color of the bottle is not very pure, and there are a lot of bubbles.

After some urgent discussion and inspection, the members of the chemical team decided that the proportion of raw ingredients needed to be improved, and the purity of borax should also be improved, so that the quality of the glass bottles could be guaranteed.

On the second day, the members of the chemical group who seized the day regardless of fatigue, and put the high-profile glass plate flat glass machine into operation, this time it was not bad, the chemical team was busy from the morning to the afternoon, and finally there were 50 pieces of 30 cm square flat glass produced---- which is the largest area of glass that can be manufactured at present.

Although there were not many onlookers at this time, and the production site was a little deserted, the members of the chemical team were still very excited because the quality of the flat glass was good. As long as there is a good start, with the follow-up technical research, the production of a larger area of flat glass is just around the corner.

After all, in Europe in this era, a larger area of glass plates can be made with a simple drum method, and the chemical group and the mechanical group have expressed that they will join forces to tackle technical problems, and told the people who eat melons that they are fully confident that in the near future, they will use a more advanced flat drawing process to produce glass plates, which is guaranteed to be straighter, larger in area, and more pure and transparent than the Venetians.

Mr. Zhao said that this will bring goods such as large dressing mirrors to the new world in advance, at least twenty years in advance, and I mean large-scale mass production! Teacher Zhao announced with confidence.

However, although Mr. Zhao's words are so, in fact, they also know that the flat drawing process is not so simple, and it requires the accumulation of various experiences, so in the next few years, the popular Australian mirrors that have swept the world are only rectangular, and only a few specifications are very single, and there are only a few major changes until a few years later, which is a later story.

The production of flat glass went smoothly, but the subsequent mirror making was very unsmooth.

Under the existing process and industrial base conditions, it took a lot of effort for the chemical team to silver-plate these flat glasses and turn them into real mirrors.

At this time, there was already the technology of tin-mercury glass mirrors, which was considered an absolute technical secret in Nuremberg and the Republic of Venice in Europe.

Of course, it is not a secret to the people in the chemical group, although there are tin and mercury caves, but the chemical team said that they are unwilling to use this method, on the grounds that this process is very, very, very harmful to the human body, important to say three times!

Of course, there is another real reason behind this - pride.

The members of the chemical industry group disdainfully said, since we have come to this era, do we still need to use European technology?

Isn't the silver mirror reaction fragrant?

This is high school chemistry knowledge! If we don't know the application, it's too low!

Therefore, the chemical team finally unanimously decided to use the glucose-silver mirror reaction to paste silver on the flat glass.

On the third night of the flat glass being produced, the chemical team in Haikou began to prepare the raw materials for the silver mirror reaction, silver is ready-made, as for glucose, it can be replaced by maltose, and nitric acid, ammonia and soda ash, etc., the cave materials and the infirmary are also ready-made, not to mention that there is a large amount of hypochlorous acid disinfectant in the infirmary, which can prepare silver.

However, after the final discussion, the chemical team believes that because nitric acid and ammonia cannot be prepared now, it is helpless to use the ready-made ones in the cave, but the soda in the infirmary should not be used as much as possible, because the doctors also need pharmaceutical research, and it is indeed a pity to use medical-grade soda ash as a glass mirror, soda is soda ash, and I believe that other preparation methods should be found.

After all, making the most of the existing conditions is the long-term strategy for mass production in the future.

Soda ash is an ordinary chemical raw material in fact, there are many preparation methods, the more formal method is to take miscanthus nitrate, coal and limestone calcination, which is called thermal reduction method, can obtain relatively pure soda ash.

However, can't you do this for a while? When the brothers were scratching their ears and cheeks, Lao Zhu came to tell Mr. Zhao that there was a large amount of red seaweed in the shallow sea area on the north shore of Sydney Island, maybe this thing could prepare soda ash or other alkalis, but the purity or something, so they didn't dare to pack the ticket......

Well, anyway, Lao Zhu's suggestion made the eyes of the members of the chemical industry group light up, and early the next morning, Mr. Zhao took the young people of the chemical industry group to Sydney Island in a small boat to catch a few boats of seaweed.

Then they set up a simple stove outside Lao Zhu's livestock shed, burned the seaweed into plant ash, and then put it into a large pot of pasture to cook feed, add water to dissolve, and then boil the water to dry, and finally obtained a gray-black substance.

Mr. Zhao took the test paper and tested it, and found that the alkalinity was quite high, so he added water to dissolve, filtered the cotton, boiled and dried it again, and after several tosses, after a day, the original black-gray powder turned into a light gray powder.

Then Mr. Zhao and they decisively decided, and that's it! Let's get by......

After some discussion among the members of the chemical group, it was finally decided to use this powder, whose main components and impurities are completely unknown, as soda ash.

Next was the demonstration of the production of glass mirrors in the cave that night, which caused many onlookers to watch.

Mr. Zhao told the onlookers that the mirror-making process shown below is called the "silver mirror reaction", which was invented by German chemists in the early 19th century in the old world.

First of all, Zhao Xihe put some small silver particles into the dilute nitric acid solution, and after a while, the silver particles gradually dissolved and disappeared, and the diluted nitric acid directly had a chemical reaction with silver, which is the silver nitrate solution - the most important chemical material for the silver mirror reaction.

With silver nitrate, everything else has become relatively easier, and Lao Wang has already prepared maltose, which is what the chemical team asked Lao Wang to help with glutinous rice and corn to steam and cook with soil.

As for the nitric acid and ammonia needed for the silver mirror reaction, they are all karst cave materials, but Mr. Zhao said on the spot that after the coal coke chemical production line is put into operation, we can gradually produce ammonia.

As for nitric acid, the chemical group believes that it depends on the external input of saltpeter, but if the energy situation allows, the chemical group tends to prepare it directly by the arc method, so please rest assured that these chemical raw materials can be prepared through our existing conditions.

As for the sodium hydroxide used in the current silver mirror reaction, it has been replaced with seaweed plant ash fired today.

For the traversers, the night of May 23, 1657 is a moment recorded in history, many people in the Red House came to watch Mr. Zhao do the silver mirror reaction test, although many people have seen the chemistry teacher's experiment in the middle school chemistry class, but this time the significance is too great, even Taotaohai Donghainan has brought young children to visit, for safety, the children are wearing masks.

The experimental site is a medicinal chemistry laboratory set up by doctors, which is actually a small courtyard surrounded by several containers in a karst cave.

In the center of the courtyard there was a large iron workbench where the Silver Mirror experiment was conducted.

First, Zhao Xihe carefully dissolves the maltose in water, then adds plant ash, which is the so-called lye that must be quoted, and then uses a cotton swab to apply the silver nitrate solution to a selected glass piece.

Then pour maltose lye and ammonia in turn, and after a while, a miracle finally happened, a thin layer of silver appeared on the glass sheet, probably the reason why the seaweed grass ash that replaced the soda ash was impure, the silver layer was a little potholed, the particles were obvious, and the color was also a little black.

Despite these "flaws", the onlookers still gave warm applause.

Because the silver was finally restored and pasted on the glass plate.