I can copy infinitely in the sky island of all people

Even if it is not available now, it will definitely be available in the future.

After all, although everyone is now in the farming era.

But the hand generator on my side has already been produced.

It is only a matter of time before we enter the industrial age.

After really entering the industrial age.

The value of gold will soon be reflected.

after all.

Gold has excellent stability and good electrical and thermal conductivity, so gold is more and more widely used in the electronics industry.

Besides.

It also has special uses in subsequent chemical raw materials.

all in all.

Gold is used a lot now, and it will definitely need to be used in large quantities in the future.

and so.

Jiang Tian is also hoarding intentionally or unintentionally.

Until the entire warehouse is full.

this behavior.

It was not understood by others at first.

after all.

The most valuable metal now is iron ore, which can be made into weapons and armor.

Gold is too soft to fit at all.

Jiang Tian just wanted to say that these people's vision is really too short-sighted.

I bought gold ore, do I have to use it now?

Well now.

Wang Yun put forward the theory of currency.

Gold can also come in handy.

For example, in terms of coins, they can be made entirely of gold.

Including the anti-counterfeiting marks that Luban will make, and gold powder can also be used...

For Jiang Tian's words.

Tang Yan just nodded, and then led his men to the warehouse to carry the gold ore.

then.

It didn't take long.

The private message sounded.

It was sent from the business alliance group.

Jiang Tian clicked to take a look.

It turned out that the painter had already designed the pattern of the thorn flower.

And ate everyone.

0888: "In terms of painting, you have to be a painter, the paintings are lifelike!"

0066: "Although I am annoyed by the fat man above, I have to say that what he said is right."

Empress: "The painting of thorn flowers is so lifelike!"

Jiang Tian took a look.

really.

On a piece of white paper, use elegant thin lines to outline a thorny flower full of thorns.

Not a clump, just a single flower.

But it seems extremely tenacious.

"The painting is good." Jiang Tian praised.

Artist: "Hey, as long as you are satisfied! I will send you the text now!"

Jiang Tian: "Okay, I will arrange people to make it right now. When the currency comes out in the first edition, I will send you a set. You can take a closer look and communicate with me in time if you have any questions."

Everyone replied: "Got it!"

……

soon.

A piece of white paper with thorns and flowers appeared in Jiang Tian's hands.

Jiang Tian took the blank paper and approached Lu Ban and Tang Yan again.

The two of them happened to be making abrasive tools at this time.

At this time, the pattern arrived, and the two of them were unambiguous, and they both quickly carved it.

And Cai Wenji's side.

It is also rushing to make exquisite paper.

at this time.

She is using ancient techniques to apply a waterproof coating to the surface of a batch of finished paper.

Because Jiang Tian explained it at the meeting.

The banknotes issued by the business alliance must not be crushed or soaked in water.

and so.

Cai Wenji can only use the technology of oiled paper umbrellas to make this batch of banknotes.

Don't look at it as simple as it sounds.

It is extremely difficult to actually operate it.

after all.

The amount of oil must be controlled.

It is the kind that only has one layer on the surface of the paper, and does not penetrate and affect the appearance.

If the oil content is too large.

The entire note will take on an oily dark color.

In terms of beauty, it can be directly passed by PASS.

……

Chapter 1210

Cai Wenji is still busy with the waterproofing skills of the paper.

Lu Ban has already carved out the mold of the coin.

He found Jiang Tian immediately.

Pass the mold to Jiang Tian for review.

"My lord, according to the requirements, the mold of the coin has been made. The anti-counterfeiting mark has also made small and dense dents on the side of the coin according to your instructions. These dents seem to be irregular, but in fact there are several points. In it, I engraved it into an untraceable code..."

When engraving these codes, Lu Ban also took a lot of effort.

after all.

The anti-counterfeiting mark that Jiang Tian requested must be aesthetically pleasing and secure enough to make it difficult for people to copy.

and so.

Luban racked his brains.Just thought of this way.

And Jiang Tian took the mold and looked at it carefully for a while, then nodded in satisfaction.

It is worthy of being the originator of craftsmen.

The coding in these dents is almost invisible unless you look carefully.

The mold brought by Lu Ban is a mold with the number 1.

That is 1 merchant alliance currency.

Next.

Luban also needs to make molds for 5 Shangmeng coins, 10 Shangmeng coins, and 20 Shangmeng coins.

of course.

In addition to the different denominations of these business alliance coins, the pattern also changes slightly.

Although they are also Bauhinia flowers.

However, Lu Ban made changes in the perspective of the original painting.

As for the anti-counterfeiting mark, no other changes have been made.

It is still the same as the mold of this 1 business alliance coin.

"Good job."

"Since the coin molds are almost done, let someone send these molds to Tang Yan, and let Tang Yan produce a batch first to have a look."

want to come.

Tangyan's refining of gold ore should be almost done.

The purification of gold mines is also a matter of kung fu.

After getting the gold ore, you need to grind it first.

It is to put the ore into the water pestle, crush the large pieces of ore through hydraulic action, and then grind it into powder with a stone mill.

Then wash.

The ore powder is placed in water and washed continuously to remove the part that does not contain ore, leaving the powder with more gold.

The jargon is called concentrate powder.

Followed.

That is, the dough is sintered.

As the name implies, gold-containing powder and rice are mixed together to make pellets, layered with charcoal and piled up to remove sulfide sulfur and sinter into crisp ore clusters.

After this step, lead reduction smelting will begin.

The so-called lead reduction smelting is to mix and smelt ore lumps of lead, and perform chemical replacement to form lead nuggets containing gold and silver.

Fortunately.

Lead thing.

When Jiang Tian helped those empires make crowns, he made a lot of them.

Now it is also piled up a lot.

At this point.

It is time to carry out the final step - ash blowing.

That is to put the lead block containing gold and silver on the plant ash to smelt, and blow in oxygen to remove the lead in the lead block.

By blowing off the grass ash, high-purity gold can be harvested.

The method is not difficult.