The yellowing is sulfur.

Outside the Great Wall, it should be called Kunlun Huang, or it may be called Xitu or something.

The grayish white ones are saltpeter... Many of these minerals have been weathered, and some are dyed with earth. If people walk on the road, they don’t know what they are.

But recognizing these ores is Lu Zhou's basic quality and it is not difficult. In his laboratory in his previous life, there were stones picked up by professors and classmates everywhere...

Looking at this part of the ore, saltpeter and Kunlun Huang are also excellent.

There are some boiled and filtered products in the barrel. Now that there is charcoal, Lu Zhou grinds it carefully to take the last step.

......

The ratio of black gunpowder is very simple.

One nitrate, two sulfonates, and three charcoal.

According to this mantra that has been passed down since ancient times, even ordinary old farmers can make it worthy of it.

But Lu Zhou's purpose is obviously more than that.

He wanted to try it out and make smokeless powder.

This is a kind of gunpowder that was discovered by chance in the mid-19th century and started mass production only at the end of the 19th century. The emergence of smokeless gunpowder gave the Maxim machine gun a real war-based use value.

There is nothing more special, that is, it can burn more fully and is smoke-free, improves ballistic balance, increases range and accuracy.

But this is an indispensable step in the beginning of the development of modern ammunition.

......

I don't know how long this experiment has been done.

Lu Zhou proceeded carefully step by step, mainly because the homemade vacuum bottles were not good, and the distillation device was terrible.

This is only the first attempt and may fail.

Fortunately, with the bumps and bruises, everything ahead was still going smoothly with skillful techniques.

Until the last step, Lu Zhou suddenly stopped.

He was stunned.

No ignition...

“No cotton!”

"This is a big mistake. How can you ignite without cotton..."

This is a fatal problem.

Lu Zhou blamed himself for Ma Daha. He has prepared so many things in the past few days, but he forgot about the ignition step.

Smokeless gunpowder is also called nitrocellulose.

This last step naturally requires fiber ignition, and it is also the most failures and the most critical step.

The requirements for ignition materials are very high.

But in this kind of place, there is no piece of cotton in the whole village. Even if it is found, it is probably not qualified.

"If you don't have cotton, you don't know if it's feasible if you use cashmere. They are all natural fibers, but no one has done this kind of experiment..."

Lu Zhou only knew that sometimes animal fat can replace saltpeter.

But I have never seen it before using cashmere instead of cotton.

No matter what, Lu Zhou decided to give it a try.

Pull out a piece of cashmere from the body.

Put it directly on a pile of prepared powder and light it.

The first time it was not possible, but it proved that cashmere still has some effect.

After continuous attempts, Lu Zhou chose to suspend the experiment on the eve of success.

The reason is that he is afraid that he will be killed if he continues like this...

There is nothing wrong, it is really life-threatening.

If you continue to do this topic, it may be possible.

But it also takes many attempts.

Because Lu Zhou found that he was increasingly exaggerating and bold experiments, he was tempted to the boundary again and again, worried that he would be killed by the bomb...

The most dangerous thing before success comes.

This is not an exaggeration at all.

Nitrocellulose fibers have extremely poor stability.

The deeds of many martyrs in the history of science quickly calmed down.

He is not a science madman, and it is absolutely unnecessary to live a life of resumption.

"This final critical step seems to be not that easy.

Fortunately, I got experimental data and the future is promising. When there are more people in the village, I will train a few more people to make this thing...

As of now, we still have to return to the black powder step.”

In desperation, Lu Zhou had to pick it up and use the remaining purified materials to match it with an improved version of black gunpowder.

"I don't know how effective my black gunpowder is. The products after the failure of smokeless gunpowder should be better than the current gunpowder..."

It was about half an hour later.

Lu Zhou was carrying a wooden barrel in his hand, with some pure black gunpowder inside, about three or five kilograms, and walked out of the tent.

As soon as he came out, he saw Ula standing at the door of the tent, looking eagerly.

Lu Er and Huang Cheng are also here.

The servants around him watched the situation on the tent from time to time.

When I saw the master coming out of the tent, I finally breathed a sigh of relief.

"Wula, go and call Lao Zhang over and tell him to bring a gun."

Ula did not set off immediately, but said with an emotional look on her face:

"Master, you're out and scared us to death!"

"It's just a thing, what's there to scare?"

Lu Zhou raised his head and realized that time passed so quickly, it was dawn, and now it was probably already noon...

Time flies so fast.

When he was studying for graduate school, he had done similar experiments. Lu Zhou had strong hands-on ability and could complete it without two major classes.

Now there is a shortage of experimental equipment. As soon as I get into the tent, I even forget about hunger and cold...

Wula said with a look of fear, "Master, don't do this again in the future. There are fire and smoke in the tent. If you have a few shortcomings, what can the people in the village do?"

Lu Er also nodded beside him: "If you have anything to do, you can leave it to the servants. The master is the backbone of the entire Zhuangzi..."

Lu Zhou laughed silently, and looked at the beggar-like men and servants around him, all looking worried.

When I saw the master come out of the tent safely, I gradually felt relieved. Everyone knew that the hope now was brought by the master.

"Well, I've completed the first step, and I'll leave it to others in the future."

Old Zhang had already arrived at the news. When he saw the master coming out of the tent, he was relieved. Then he saw the gunpowder in the wooden barrel, and his eyes lit up.

"Master, these gunpowders are of good quality..."

......

The group came to the training ground curiously.

Lao Zhang took a few apprentices and started to test the gun himself.

I saw a wooden block above a distance of about fifty meters. When I went to see it again, there were already many small holes on the wooden board.

The group looked surprised. It turned out that this was the firearm in the master's mouth, so powerful.

Lu Er felt that the knife in his hand was no longer fragrant.

If there are a few such things, why are you afraid of big insects?

After firing several shots in a row.

This time it was Lao Zhang's turn to be surprised.

He had never had a record in his life, but even a single musket was not exploded!

Of course, he also knew himself and said with admiration: "Master, it seems that these irons are indeed good!"

Lu Zhou was not surprised when he heard this. It was appropriate to shoot a short gun in 20 steel, but if it was a long pipe, it would be a bit forced.

He just gave the black gunpowder he had refined in his hand to Lao Zhang and asked several people to exchange for this kind of gunpowder and try again.

The gunpowder I filled in for the first time was seized from the Tartars that night, and the quality was somewhat mixed.

After Lao Zhang took the gunpowder from Lu Zhou's hand, his expression became straight.

Wipe and fill the gun, and follow the sound of a gun.

I saw the wooden board fifty meters away falling down in response to the sound.
Chapter completed!