During the Southern Song Dynasty, leather workshops generally gathered in Pishi Lane, and they were all front and back workshops to run the leather goods business. Pen, fun, pavilion www. biquge。 info

It's pretty competitive.

The leather goods of this plane really scared the smugglers at the time.

On Lin'an Yu Street, they saw the handmaidens who accompanied the rich and noble women shopping with them carrying or holding leather bags, which were really similar to the world on that side, of course, the color or decoration was definitely incomparable.

At this time in the Great Song Dynasty, men wore leather boots and shoes, and used leather bags or leather jackets to carry their money and belongings.

This is the standard for the rich, and ordinary people are cotton or linen.

As mentioned above, the Great Song Dynasty's demand for skins is also endless, and it is a strategic material.

They set up a huge tannery, which was called "Leather Corner Field".

But there is also a demand among the people, so leather goods can only be very expensive.

Zhang Guoan went to him to order a batch of leather goods, and the level of others is indeed higher than his own.

The sodium sulfide he provided was very proficient after a few uses, and he shouted that it was a good object, saving too much effort.

At least, they don't have to swing a big wooden hammer to soften the skin.

Zhang Guoan is going to regularize his Liuqiu Guard, starting with the costumes.

He designed an X-shaped belt that could hang a waist knife and five palm mines, as well as a bullet pack.

In addition to a multi-layer cotton cloth soaked in tung oil, a backpack should also be filled with a bamboo tube with light salt water and a lid.

Zhang Guoan calculated, but it was only twenty kilograms.

Of course, the backpack still looks a little empty, but there is a real need for more.

Zhang Guoan and Yu Lianbian introduced. Draw it on paper to him.

Yu Lian didn't understand why the bullet pack was divided into so many compartments.

Zhang Guoan said: "Don't ask, I need -----"

Of course, Zhang Guoan didn't dare to put the fire cap and the propellant together, even if the twenty fire caps exploded together, it would be fine, but if the twenty grams of propellant were ignited, it would hurt people. So be separated.

There is also a leather belt, and he found someone else to make the belt belt.

Then there's the leather shoes.

At this time, silk, silk is basically the main material used to make socks, but it is only suitable for the aristocratic class, because it is expensive and the friction is not enough, it is not comfortable to wear.

Therefore, cotton cloth and linen cloth are the best materials for making socks.

There are generally two kinds of socks in the Great Song Dynasty, one is long, which was called tube socks by the northerners at that time.

Sometimes it's attached to the shoe. Inherently known as "shoes and socks"!

A kind of socks in the south of the Great Song Dynasty are short-barreled, only to the ankles, suitable for travel and field work, in ancient times, socks are relatively thick, although the material is breathable, but in the summer wearing will be more stuffy!

However, he had to let the members of the guard put it on, which would protect the feet.

Yu Lian was interested in the style of the backpack, and he said, "Zhang Shipbow." I really didn't expect you to know a lot about this leather goods-----"

Zhang Guoan said in his heart. Definitely more than you.

He then drew a men's crossbody bag, as well as a purse.

Zhang Guoan said: "Do you see this wallet? It is divided into two layers, one for folding in half, one for some copper coins, and this wallet can also be folded in half! ”

Yu Lian thought about it for a long time, and it felt really ingenious. Daxi said: "The leather goods you ordered, the manual cost is not taken at the next penny." ”

It's good, the equivalent exchange, he simply drew another suitcase.

Yu Lian saw that he didn't think so, and Zhang Guoan immediately drew a lever and two small wheels. Sample, I can't shake you yet.

That's in the joint service.

He respectfully sent Zhang Guoan out.

When Zhang Guoan returned to the blacksmith shed, the barrel had already been laid.

The two blacksmiths clamped the barrels of their guns on their carpentry machines, one shaking the wheel, the other pushing slowly and vigorously on the chute.

The barrel had to be milled, and here they borrowed the tools left by the master, which were much better than the iron knives they had used.

After they finished milling, Zhang Guoan took out several Avatar cemented carbide steel rifling reamers of different sizes, which were all customized by Song Ziqiang in that world, which was extremely cheap, if it was not customized, it would only cost fifteen and one, and the customized one would cost only one hundred yuan, and he also bargained for ninety-five yuan at that time.

At that time, Song Ziqiang said proudly: "No one is having a good time with machining, if it weren't for the sake of my peers, I would be able to sell me when I talked about eighty!" ”

The 17.8 mm that was said to be good, the result was 17.6 mm.

But Zhang Guoan was prepared, he picked and found the right one.

Then, ask them to change the cutter out.

Song Ziqiang had told him carefully beforehand, and he had also watched the video of the online demonstration, and it was really like he said, the carpenter did this job.

The role of rifling is to rotate the lead warhead, creating a squeezing stress, and it is this force that forces the warhead to rotate.

If you want to increase the extrusion force, you need to increase the force area, either to increase the diameter of the female wire, that is, the rifling is very deep, or to increase the number of rifling.

If the rifling is too deep, the bending moment at the root of the rifling is very large, the strength and fatigue strength are problems, and the breath-holding is also a problem.

Therefore, Zhang Guoan chose the method of increasing the number of rifling wires, and made it into a five-strip type, which can be shallower.

Zhang Guojia has become a veteran, and those blacksmiths certainly don't know the details.

When Zhang Guoan carefully pulled it up, he was already sweating profusely.

The blacksmiths looked at each other with the barrels of their guns in their hands, and asked what was the use of doing this.

Zhang Guoan thought for a while and said, "I don't know if you have seen the spinning top?" Is it a child who is whipped on the ground and spun without falling to the ground? ”

Everyone immediately realized, and the blacksmith Hu Zhenbei said loudly: "Ah, Master Zhang's family is talking about Mu Qianqian!" ”

In the early days of the Great Song Dynasty, there was a kind of gadget similar to the gyro game, the name is Qianqian, similar to today's hand-twisted spinning top shape, it is made of ivory, with a diameter of about 4 inches of disc, inserted in the center of an iron needle as the axis, is a kind of aristocratic game played by the palace ladies to pass the time.

The game is to put a needle-like object about 3 centimeters long, put it in an ivory disc, twist it by hand, and then use the sleeve to blow it when it stops, so that it continues to rotate.

Later, it spread to the people, and it evolved into a wooden spinning top similar to that world.

Well, it's called Mu Qianqian.

"Why didn't that Mu Qianqian fall?"

"Whip whip, whip whip!"

"That's not the root cause, the root cause is that it's spinning itself!"

He spoke so well that they might understand something.

But in any case, they still have to do the job.

Zhang Guoan asked: "Can you guarantee that the next barrel will still be this size?" ”

The crowd didn't dare to talk.

The arquebus was a little irrelevant, with a maximum of two buckskins, but this time it seemed different.

Zhang Guoan sighed and reminded himself in his heart not to rush. (To be continued.) )