——I’m really stupid! Why haven’t I thought of such a simple truth?

A self-deprecating smile appeared on Qingdeng's lips.

This is probably the so-called "darkness under the light".

Clothes, cosmetics and jewelry - they are indeed to women what fertilizer is to crops - although crops can grow normally without fertilizer, they will not grow strong enough.

However, in addition to these three, there is one more thing that is essential for women.

That's the mirror!

How can you try on clothes without a mirror?

How do you apply makeup without a mirror?

How can you wear jewelry without a mirror?

At this thought, the self-deprecating look on Qingdeng's face became even more intense, and he laughed at himself again: Why didn't I think of that?

He had been competing with clothes, cosmetics and jewelry before, and his thoughts were spinning in dead ends. It was not until he saw Ziyang's silver mirror that he suddenly noticed this inconspicuous "golden mountain"!

Bronze mirrors are still widely used in RB nowadays.

The so-called bronze mirror, as the name suggests, is a mirror made of copper with a high tin content and carefully polished.

With such a material and such a production method, you definitely don’t have to count on its clarity.

Although it can illuminate objects, it can only reach the level of "being able to distinguish between humans and gorillas", and it is impossible to see the specific details clearly.

Therefore, compared to the bronze mirror, the silver mirror is basically a dimensionality reduction attack!

No matter in terms of clarity or beauty, silver mirrors surpass bronze mirrors in countless ways.

After Liebig discovered the "silver mirror reaction", silver mirrors began to become popular in Western countries.

Although silver mirrors are quite common in the West today, they are still a very valuable rarity in RB, which has not yet lit up the "mirror-making technology" technology tree.

After the founding of the People's Republic of China, some Western businessmen saw this business opportunity and shipped ship after ship of silver mirrors to the Republic of China.

However, because silver mirrors are fragile, it is difficult to preserve them. Coupled with the cost of shipping across the ocean, when the silver mirrors landed on RB Island, the price was sky-high!

In addition, the increasingly fierce Zongxing movement has further raised its price.

Regardless of other places, in the Gyeonggi area, which has become the forefront of the Zunban movement, Zunban patriots are hunting "national traitors" everywhere.

Any businessman who sells Western goods will be labeled as a "national traitor" by them. At worst, his shop will be smashed, and at worst, his head will be lost.

For this reason, in the entire Gyeonggi area, it is difficult to put products with Western labels on the shelves openly.

To be fair, from this aspect, the anti-imperialist movement has a certain positive significance in anti-imperialism.

The strong resistance of patriots to Western goods has invisibly increased the cost of selling silver mirrors.

So, just as Ziyang said today, if her Western silver mirror, which is less than the size of a palm, is sold in the market, it will definitely sell for a high price of 3,40 taels of gold.

There is no doubt that... silver mirrors hide huge business potential! At the same time, it is also a "blue ocean industry" that no one has set foot in!

No woman can resist a beautiful and clear mirror.

A mirror is not a necessity of life that cannot be lived without.

Its attributes dictate that only the middle and upper classes who are free from the pressure of survival have the need to use mirrors...and this is exactly what Qingdeng wants!

Making money from poor people is not what Qingden wants.

Due to layers of exploitation by the government and local gentry, the people at the bottom of today's RB have long been impoverished. The frequent peasant uprisings in recent years are the best evidence of this.

Making money from them is like scraping oil on a stone. No matter how hard you try, you can't scrape out a few ounces of oil.

Whoever has money gets it!

Looking around the entire Gyeonggi Province, the most indispensable thing is the rich.

Especially Osaka!

Osaka, which enjoys the reputation of "the kitchen of the world" and "the commercial capital", has gathered many wealthy people.

If you want to make money, make money from them!

The mirror is actually the most ideal product that meets Qingdeng's wishes.

If silver mirrors can be mass-produced, there is no doubt that he will monopolize the entire RB mirror industry!

From now on, will the Shinsengumi's military expenditures still be a problem?

By then, he may even have money to build warships!

The method of making silver mirror...or the difficulty of "silver mirror reaction" is at the level of "middle school chemistry experiment".

In modern times, if you look for any chemistry practice room in a key middle school, you can find all the materials needed for the experiment and easily complete the experiment.

It's just that the chemistry knowledge in middle school... to Qingdeng, is an ancient memory buried deep in the brain...

Fortunately, Qingdeng had always been a top student with excellent grades in his previous life.

Don’t underestimate the value of top students!

Although the specific details were blurred, he still remembered the general content and important parts clearly.

Another lucky thing is that the four chemicals needed to make silver mirrors - glucose, sodium hydroxide, ammonium hydroxide solution, and silver nitrate - can all be produced from civilian products that can be found everywhere.

After saying goodbye to Ziyang, Qingto led Mai Kinoshita to most of the markets in Kyoto and Fushimi, and finally bought all the required materials and equipment.

Use the starch contained in corn and potatoes to prepare glucose. Use 25%-5% concentration of dilute hydrochloric acid at 100 degrees to hydrolyze the starch contained in corn and potatoes to generate an aqueous solution of glucose, which can be concentrated

Obtain glucose crystals.

After the opening of the country, corn and potatoes have appeared in the vegetable markets of major cities and towns in RB, so these two vegetables are not difficult to buy.

Sodium hydroxide [NaOH] is commonly known as "caustic soda". As early as ancient times, there was a local method of making caustic soda. The component of slaked lime used in building houses is calcium hydroxide [Ca(OH)], which is mixed with soda ash [Na2CO3]

Mix the solution, filter out the solid, and then evaporate and purify it to obtain caustic soda.

Ammonium hydroxide [NH3·H2O] solution is ammonia water. Add alkali to urine, heat the reaction to generate ammonia gas, and then dissolve it in water to produce ammonia water.

As for silver nitrate, you need to use carbonized saltpeter. First, use carbonized saltpeter to obtain nitric acid. After making the nitric acid, immediately put it into silverware to make silver nitrate.

Theoretically speaking, as long as the procedures are correct and the hands and feet are deft, a silver mirror can be made in just half an hour!

Of course, the above is always theory.

No matter how beautiful the theory is, it is still false.

If you want to implement these theories into real gold and silver, you still have to rely on your own hands to gradually explore!

"call……"

Qingdeng let out a long breath, then took out the cuff band from his arms with firm eyes and tied his sleeves tightly.

"Come on!"

He lit the candle and buried himself in front of the case.

The "ding ding dong dong" sound of bottles and jars being knocked kept ringing.

…

…

About 2 hours later——

"Damn it! Not enough urine!"

Qingdeng lay on the ground in the "orz" posture.

The first experimental goal he chose was to produce ammonia.

Unexpectedly, I hit a snag just after I started.

Making ammonia requires urine.

This material should be the easiest to obtain, and Qingdeng can directly use it himself.

However, maybe it was because the equipment was not sophisticated enough - it was difficult to buy test tubes, droppers and other professional experimental equipment, so I had to make do with pots and pans - I worked hard for a while, but the result was still the same.

Ended in failure.

Not only did they fail to produce ammonia, but they also used up all the urine they had finally saved.

Although it is regrettable, the experiment must continue.

Qingdeng stood up and muttered:

"Gotta find new urine..."

After muttering like this, familiar faces passed through his mind.

Kondo Isamu, Hijikata Toshizo, Nagakura Shinpachi, Saito Ichi, Inoue Genzaburo...

Just after recalling 5 faces, he felt as if he had a nightmare, his face turned pale and his body trembled violently.

It's not that he dislikes his brothers...but...but...he really doesn't want to come into contact with these people's urine!

"Since you don't want to ask them to do anything, then you can only..."

Qingden fell silent in the middle of his murmur, with an indescribable strange emotion flowing between his brows.
To be continued...