Lu Yu didn't plan to do illegal things as soon as he came up.

For example, the sale of illicit salt.

It's too risky.

He has a lot of options and doesn't need to be in such a hurry.

You can start by doing something that is not illegal.

For example, Lu Yu used a pot of lard to refine soap, oil wax, caustic soda, and glycerin.

Then soap and candles were made out of soap and oil wax.

Soap and candles were luxury goods in this period, and ordinary people could not afford them.

But as long as it is manufactured, it will not be marketable at all.

Because at this time in the late Han Dynasty, there were too many landlords.

Wealth has shifted upwards and is in the hands of a few.

And the soap made by Lu Yu is far better than the current soaphorn and the like.

Before soap was invented, the aristocracy used items such as rice washing water and soap horns to clean their bodies.

As for the people at the bottom, they use plant ash to clean their bodies.

The appearance of soap belongs to the dimensionality reduction attack!

What's more, Lu Yu also added some spices to this soap, making it a soap with a less pungent taste.

And Lu Yu's candles, compared to the current candles, do not have such a big smell, and there is not too much smoke, which is also of the highest grade.

As soon as these two things appear, they will definitely become the treasures that the powerful people of the family compete for.

As for caustic soda and glycerin, these two things, Lu Yu did not plan to sell.

The former is an important industrial raw material, while the latter is a good thing.

Although the production is a bit low, it adds up to a lot.

Later, there is concentrated sulfuric acid and concentrated nitric acid, mix it, then add glycerin, and stir it fully to make it fully react.

In this way, nitroglycerin is obtained.

However, nitroglycerin at this time is not pure, but also a semi-finished product.

The reaction mixture must be filtered to remove unreacted impurities.

Then purify and refine the treatment.

in order to obtain high-purity nitroglycerin.

This thing is much more fierce than black powder!

As long as the purity is sufficient, it is 30 times more powerful than traditional black powder, and the detonation speed can reach 5,700 meters per second.

The so-called detonation velocity refers to the diffusion speed of the shock wave during the explosion, and the faster the speed, the greater the impact force.

But.

Nitroglycerin itself is very flammable and explosive, and may be detonated by a slight impact or static electricity, so special storage and use conditions are required, otherwise it is easy to cause accidents.

For example, diatom mud must be added to neutralize it to make a safe solid explosive.

Otherwise, it will be an explosion if you are not careful, and the consequences are unimaginable.

Lu Yu's cultivation is now low, and he doesn't want to be the first cultivator to be killed by playing with explosives, so he doesn't plan to immediately study how to make nitroglycerin.

Moreover, the degree of industry is too low now, and in this era, it is not a simple matter to make high-purity nitroglycerin.

It's important to make money first.

Lu Yu brought the finished soap and the finished candle to Tang Shigui as gifts.

Since the last time he fought for Lu Yu's interests, Tang Shigui and those heroes had a very unpleasant quarrel, coupled with the heavy rain that lasted for a month, his business was seriously affected, and it can be said that he suffered heavy losses, and his life was not good.

However, hearing Lu Yu coming, Tang Shigui was still very happy and immediately went out to greet him.

"Brother Lu, I haven't seen you for a long time, the rain a few days ago is about to make me moldy, and I don't have a chance to walk around." Tang Shigui said with a smile: "Today we must talk well, it is best to talk at night!" ”

"I brought some gifts to Brother Tang, and I'm sure Brother Tang will like it." Lu Yu smiled and lifted the box in his hand.

"Brother, you can come over, and what gifts do you bring, it's really amazing!"

At this moment, Tang Shigui didn't think much about it, and he didn't know what kind of gift Lu Yu had brought to him.

welcomed Lu Yu into the house all the way.

After a simple pleasantries.

Lu Yu took out his gift and said straight to the point: "I came here this time because I have something to discuss with Brother Tang. ”

Tang Shigui looked at the two objects in front of him, and asked with some curiosity: "This is a candle, what is this?" ”

"It's called soap." Lu Yu replied.

"Soap?" Tang Shigui frowned, vaguely understanding what this thing was for, and he opened his mouth to guess: "It's made of soaphorn?" Has a cleaning effect? ”

"Yes, this thing is used for cleaning, but it is not refined from soaphorn, but it is much better than soaphorn, Brother Tang will know it as soon as you try it." Lu Yu nodded and said.

When the two came to the house, Tang Shigui called a subordinate who was practicing.

Because of a month of rain, the training ground was full of muddy water, but even so, you have to practice, the clothes have long been dirty, and occasionally there are some oil stains, and you can't wash them off, and over time, this clothes can be described as quite unbearable.

"Take off your clothes and wash them with this thing." Tang Shigui commanded directly.

The subordinates did not hesitate, took off the clothes on their bodies, and washed them in the pond next to them.

The effect of soap on stains is amazing.

Just a simple scrubbing, a lot of foam, and after soaking, it was immediately clean.

Seeing such an effect, Tang Shigui's eyes lit up and decided to try it himself.

He had just studied the candle sent by Lu Yu, and his hands were stained with a lot of oil, so he just used this thing to wash his hands.

I simply washed my hands with soap, and the oil stain was immediately removed, and there was nothing left.

"It's so convenient!"

Tang Shigui couldn't help but admire, he instantly realized the power and value of this thing.

Then Tang Shigui pulled Lu Yu into the room and hurriedly asked the price of making this soap.

The cost determines how much profit the item can make.

"It's made of lard." Lu Yu spoke: "About twenty catties of lard can make twenty pieces of soap and more than a dozen candles." ”

One catty in the Eastern Han Dynasty is equivalent to 224 grams now, so it is twenty catties, but in fact it is less than ten catties.

"All you need is this lard?" Tang Shigui's eyes lit up and he asked again.

"Of course not, you still need some auxiliary materials, but the price is not expensive, the most expensive is the spice, which is very important, so that the lard soap can become the current soap, so that the unpleasant smell disappears." Lu Yu explained.

"This ......"

Tang Shigui looked at the two items in front of him in disbelief, he thought that the refining price might be very low, but he didn't expect it to be so low, only lard was needed to refine.

Although lard is a treasure in this era, for the powerful Tang Shigui, lard is not a precious thing at all, and this soap is a treasure.

The most important thing is that this thing is still a consumable!!

A valuable consumable!

The commercial value of this thing is unimaginable.

Tang Shigui's breathing became a little heavy.

Lu Yu really sent a big gift!

"My brother gave me this, is he going to cooperate with me to sell it?" Tang Shigui glanced at Lu Yu and asked.

It's easy to talk to smart people, Lu Yu nodded: "If that's not the case, why should I come here?" ”

"How is Brother Lu going to cooperate?" Tang Shigui asked.

"I'll pay 500,000 yuan, and then I will pay this refining technology, accounting for 50% of the profits, how much do you want to pay, Brother Tang?" Lu Yu said slowly, and threw the question to Tang Shigui again.

When Tang Shigui heard this, he couldn't help frowning and thinking about it, and after a while, he raised his head and said seriously: "My family can contribute four million yuan, plus all the business routes of our family, it also accounts for fifty percent of the profits, how about it?" ”

"Not enough." Lu Yu shook his head.

"Five million!" Tang Shigui knew the profit and immediately raised the price.

"Yes, but I have one more condition." Lu Yu spoke.

"Please!" Tang Shigui hurriedly said.

"In the process of refining lard, in addition to producing oil candles and soap, two substances are produced, which I named caustic soda and glycerin." Lu Yu thought for a while and said, "But I can't figure out what the use of these two things is for the time being, so they all have to be mine, let me continue to study, how about it?" ”

"Absolutely!" Tang Shigui nodded without thinking, if something useful is researched, you can continue to cooperate!

After the initial negotiation of cooperation, both sides are very satisfied with the result.

Tang Shigui knew that Lu Yu's methods were extraordinary, so he didn't have the mind to fool Lu Yu at all, and he didn't dare to kick him out of the game, it was better to cooperate honestly and win-win!