PS: Thank you Randy for being the first leader of the book. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

Zhang Guoan has long decided to use two methods to process sulfur dyes.

One is the baking method, in which nitro is baked with sulfur or sodium polysulfide at high temperatures to produce yellow, orange and brown sulfur dyes at different temperatures.

The second is the boiling method, in which nitro and sodium polysulfide are heated and boiled in water or organic solvent to prepare black, blue and green sulfur dyes at temperature and time.

Sodium polysulfide is so useful that without it, there would be no sulfur dyes, and it is also the best depilatory and softener for leather, mixed with some water, it can be used as an insecticide for farmland or the environment.

The preparation is also simple, it can be obtained by heating and melting sulfur and soda ash, or it can be heated and melted and poured into the caustic soda solution, which is an autocatalytic reaction.

But sulfide dyes do not dissolve in water, only in sodium sulfide solution.

This is also easy to do.

In this time and space, miscanthus nitrate, that is, sodium sulfate, is calcined with carbon powder at a temperature of more than 800 degrees according to a certain ratio, and after cooling, it is hotly dissolved into a liquid with dilute lye, and then it is allowed to stand and clarify, and the upper concentrated lye is concentrated to obtain solid sodium sulfide.

The reason why Zhang Guoan wants so much is because he wants to firmly grasp the upstream of important products, and he doesn't want to learn from Lei Feng.

He supplies important chemical supplies, and the merchants of the Great Song Dynasty should produce and sell them themselves.

He demanded that all the development on the island be carried out in an orderly manner.

By what control?

At the moment, we are relying on arquebuses with one hand and science with the other, and when everything is on the right track and the law of development is formed, it will all depend on science.

It's not normal to always rely on guns to sustain itself.

The next few days. He also met with several merchants of the Great Song Dynasty, some successful and some unsuccessful, after all, there was no effect.

As he had expected, there were no real giant businessmen or big businessmen.

It seems that the real giant businessmen and big businessmen will not take risks easily.

In this way, he slowly prepared the things. The date for the return voyage was also set.

He was a little unhappy that he calculated the materials that Da Song gave back to him with his heart, and they were about the same price as the ones he gave Da Song.

Can't you give a little more?!

How much have we contributed to the Great Song?!

But he couldn't say anything, he could only admit it, it's better than asking for you for nothing, and not giving anything, right?!

Fortunately, Pingzhang Jia seemed to be more exquisite, and really gave him more than 1,000 soldiers to act as salt frying people, and supplemented the corresponding supplies.

In this way, the size of his fleet was much larger. Reached almost forty ships of the sea!

There are not even the merchants he has attracted investment, and some of them have their own sea boats.

Zhang Guoan had to hire some other people's sea vessels.

Throughout China's more than 3,000 years of history, the only dynasty that really vigorously promoted non-governmental maritime trade was the Southern Song Dynasty.

In order to rapidly accumulate central treasury to counter the powerful northern nomads, the Southern Song government pursued a pragmatic economic policy, encouraged private shipping and trade activities, and taxed private merchants through the municipal shipping department, who were willing to do business and get rich under the protection of the government.

As mentioned earlier. The shipbuilding centers of the Great Song Dynasty were distributed in the coastal areas of Fujian, Zhejiang, and Guangdong, after the Southern Song Dynasty came to Hangzhou. The shipbuilding in this area is more rapid, and it has taken a big step forward on the basis of inheriting the shipbuilding and navigation technology of the Northern Song Dynasty.

In particular, the proportion of civilian shipping sites has increased, supporting this world's leading maritime power.

The Southern Song Dynasty owned a large number of seagoing ships, which could account for half of the world's time and space.

So he hired the ships he needed very casually.

At this point in time, it is not the high/tide period for going to sea to do business. But when it comes to going to Liuqiu Oshima, although the average captain has never been there, he knows that it is only a few days' journey.

Before leaving, he had an explanation that he had the Mihara Eleven as the captain and go to the mouth of the river closest to the sulfur mine to open up wasteland and build a wharf.

Then. He asked, "Have you seen our method of clearing the wasteland?" ”

Captain Mihara Eleven bowed and said, "I know that I will burn it with whale oil, black fire/medicine!" ”

Captain Mihara Eleven was very interested in the arquebus, and he never had a chance to touch it, but later, the main family got two clubs, and he had the opportunity to give it a try.

After trying it, I admired the master's family even more, so the words of the master's family are everything.

In Zhang Guoan's plan, he took these people to the Badaohe estuary base to rectify it first, and then began to act separately.

When he went to meet Pingzhang Jia Rudao, probably because he was proud of the spring breeze now, he soon met him.

Pingzhang Jia seemed to praise him for his spirit of praying for the blessings of the Great Song Dynasty, without self-interest, and specializing in benefiting others.

But where does Zhang Guoan want to hear this? But out of politeness, I humbly agreed.

Pingzhang Jia looked at his watch, probably feeling that there was too much nonsense, so he said: "Zhang Dashang, the official family likes the watch you presented.

And when he heard that you were selling it for 100,000 yuan, he gave you an additional forty stones of brass------

Zhang Guoan calculated, about four tons------ only four tons!

The Great Song Dynasty is the world's largest copper-producing country in this time and space, and they have the largest open-pit copper mine in Asia.

But Zhang Guoan's face was silent, but he pretended to be very grateful.

Pingzhang Jia seemed to be happy and said, "Don't be in a hurry to thank you first, the old man will personally give you thirty stones of copper!" ”

Well, that's a bonus.

Pingzhang Jia seemed to clap his hands again at this time, and a woman came in from outside.

Zhang Guoxin jumped a little, it wouldn't be to send a woman.

But really.

Pingzhang Jia said: "This is a handmaid of the old man, named Xiao Wanniang, innocent as jade, I heard that you only have one wife, and the old man will give you a ------ to sleep here."

Can that woman be eighteen years old? Look at the body image, and it is still a down-and-out and generous appearance.

It seems that this plane is really an era where people can be treated as commodities.

Pingzhang Jia said: "The old man has read countless people in his life, you act steadily, and you are a good person, you will take good care of her ------"

Zhang Guoan smiled in his heart and accepted it.

But I absolutely know that I won't let quiet, I will never let it!

He just took a fancy to her as a person, but in fact, he was thinking of Huang Zu.

When he returned home, he said to Xiao Wanniang, "Sister, tell you the truth." My wife is the best woman in the world, and if I take you, she will surely kill us both. ”

Xiao Wanniang was not generous at that time, and she was so frightened that she lost her face.

At this time, the Great Song Dynasty did protect many rights of the concubine in accordance with the law, but because the eldest woman was jealous, there were many cases of torturing and beating the concubine to death, not rumors.

So Xiao Wanniang was a little panicked, she said: "Zhang Daguan, how is this good? ”

Zhang Guoan smiled mysteriously and said, "I have a way to keep you safe!" ”

Then he said the way, and Xiao Wanniang immediately put her mind at ease. (To be continued.) )