Even though he had already brought a mask, the smell of urea when he boiled the urea still made Marlin want to vomit with nausea. However, because the manufacture of silver mirrors is highly secret, Marin is not willing to fake others. Therefore, he was so disgusted that it was considered self-inflicted.

The silver mirror made by the silver mirror reaction made of silver should not be too good. took it to Angela, Angela obviously felt that the mirror was much brighter, and her self inside was more bright and moving.

"Okay, this mirror is safe, you can use it with confidence. However, don't say I made it, I bought it from Venice. Marin admonished, and had a silver frame made that was exactly the same as the original mirror.

Marin went to buy Venetian mirrors in order to copy Venetian mirrors, so as not to make people suspicious. After the mirror was bought, several reliable craftsmen began to copy the patterns and carvings on the silver frame of the Venetian glass mirror.

Subsequently, the craftsmen directly created copper molds, which could be pressed on a spiral die-casting machine to create the same pattern and engraving as the silver frames of Venetian glass mirrors. Because the material of silver is softer, although the silver frame used in Venetian glass mirrors is not pure silver and is not so soft, it is also softer than copper and is easy to press.

Then, the Venetian glass mirror with mercury tin-plated foil that he had bought from Venice at a great price was naturally honorably retired. Of course, it's still useful......

"I plan to send this mirror to China and dedicate it to the emperor of the Ming Dynasty......" Ma Lin decided to waste it and take this mirror in exchange for benefits.

"But didn't you say there was mercury in it?" Angela was a little confused.

Marin smiled:

"It's been a few months since this mirror, and if I send it to Mingguo, at least half a year has passed. Basically, the effect of poison gas is minimal. ”

In fact, the mercury tin-plated foil glass mirror, the first three months are the most dangerous, and it really takes more than half a year to pass, as long as you don't sleep with the mirror, the harm is still not great. It's just that with such a good mirror, it seems unlikely that a woman will sleep without holding it......

"You better think of a way to make people less harmful!" Angela has a kind heart, and she thinks that her own man has a lot of ideas, so she wants to help others.

Angela knew that Marlin was planning to make a huge profit by making this kind of glass mirror in the future. At that time, not only foreign customers will use this kind of mirror in large quantities, but also many people in Beihai Country will also use this kind of mirror.

As for Angela's own silver mirror, Marin said that it was difficult to do, and he didn't want to do it again for a long time (mainly disgusting).

Foreigners are okay to say, but for people in China, Angela doesn't want them to be harmed. In particular, Angela can think with her toes that those who will use this kind of mirror a lot in the future must be domestic noblewomen. And many noblewomen in Beihai Country have a good relationship with Angela. So, Angela doesn't want them to be poisoned by mirrors......

"Less harmful...... Does it reduce toxicity? Marin fell into deep thought......

……

In the final analysis, the main hazard of mercury tin-plated glass mirrors is that the residual mercury vapor is inhaled into the human body and causes mercury poisoning. If you want to reduce the harm, you must clean up the residual mercury......

And how to remove or neutralize the harm of mercury? Marin thought for a moment......

"What is the reaction of mercury? What sodium thiosulfate seems to be used in later generations? By the way, mercury in nature is often in the form of cinnabar. And cinnabar is mercury sulfide......"

"Looks like sulfur can also react with mercury? Ma Lin vaguely remembered that it seemed that a later chemistry teacher mentioned that if the mercury was overturned, sulfur would be sprinkled to neutralize it and produce mercury sulfide that was not toxic? ”

……

After thinking about it for a long time, Marin finally came up with a way to understand the effect of mercury vapor, which is to bury a glass mirror in sulfur powder, and then, heating it at medium temperature, forcing the mercury vapor to volatilize, and react with sulfur to form mercury sulfide, that is, cinnabar......

Although this may not be able to clarify the composition of mercury, it can basically reduce the toxicity and avoid users from being poisoned.

Angela is right, this thing will definitely be used by the noble ladies in the Beihai Kingdom in the future. Therefore, it is necessary to process properly to reduce toxicity. After all, Marin can't poison his own people.

As for silver-plated glass mirrors for domestic ladies, there is no need to think about it. Why? It's going to leak secrets!

The effect of silver-plated glass mirrors is significantly better than that of mercury-plated tin-plated glass mirrors, and even fools can see it. The picture of the mercury tinned foil glass mirror is dark, while the picture of the silver-plated glass mirror is bright.

As the Grand Duchess of Beihai Kingdom and the Queen of the United States, Angela uses high-end glass mirrors, and those noblewomen of Beihai Kingdom will not feel abnormal. After all, people are queens, so shouldn't they use high-end things? It is also normal for Madame Mary to use it, after all, she is the "Queen Mother Lafayette". But if there is one lady in the Beihai Kingdom, it is not normal......

If a foreign lady comes to visit, they take out the mirror and compare it - yo, the mirror I bought at a high price in Venice is not as good as the mirror used by ordinary ladies in Beihai Country?

In this way, the fact that Beihai has mastered better mirror-making technology will definitely spread. When the time comes, Venice will also find fault with Marin - did you steal our technology?

France will also find fault, because France is the most smelly and beautiful country, and there is a great demand for mirrors, and the requirements are the highest. In order to save costs and mass production, France may unite with other countries to force the North Sea countries to hand over their confidential ......

Therefore, before his own strength was not strong enough, Marin only planned to produce mercury tin-plated tin-plated glass mirrors for the time being, and make a fortune following Venice. When the time comes, even if people are red, they will only be red in Venice. After all, the gun shoots the first bird. Marin, on the other hand, quietly followed to make a fortune and count the money.

Of course, it is also important to be able to make customers healthy. Especially, the noble ladies of the North Sea Country.

These people will take on the responsibility of giving birth to small nobles for the Beihai Kingdom. In the case of mercury poisoning, the child may be deformed. Marin didn't want the second generation of nobles in his country to be deformed or intellectually abnormal. Therefore, it is also important to minimize the possibility of mercury poisoning.

Subsequently, Marlin conducted an experiment. He found that when the entire glass mirror was heated by throwing it into sulfur powder, the mercury vapor and the mercury sulfide produced by the sulfur were prone to form red spots on the back of the mirror. Obviously, that's cinnabar.

At the same time, the border made of silver is also easy to turn black. Obviously, after heating, even the relatively stable nature of silver has some trace reactions with sulfur, and a small amount of gray-black silver sulfide is generated......

For this reason, Marin also gave a solution - when the mercury tinned foil glass mirror was heated in sulfur powder, the silver frame was first lowered, and only the glass mirror itself was thrown into it. Then, if there is a small red dot on the back of the mirror, repaint it again to cover it up......