It turns out that in the early days, cans were also made without iron, but with glass bottles.

It is to make the meat into broth first, and sterilize it at high temperature during the stewing process.

Then the glass jar is also steamed with hot water to complete the process of high-temperature sterilization.

Then pour the broth into the glass jar and heat it at high temperature together with the glass jar.

In this process, the high temperature kills the bacteria because there was no vacuum technology in that era.

Therefore, this method of high-temperature sterilization can only be used to ensure that the food will not be destroyed by bacteria.

Then, after steaming at high temperatures, a cork is placed on the mouth of the bottle.

As the bottle cools naturally, the cork shrinks.

In the process of reducing the size of the cork, the can and bottle will be tightly corked.

In this way, the sealing process is completed, and when it is cooled, the can is sealed.

After that, the can is taken out, and then a layer of wax is applied to the mouth of the can to complete the final sealing process.

And such canned food is generally not a problem to store for three years.

Even if the closure is not broken, it can be stored for a longer time. 、

The only disadvantage is that this kind of canned bottle is not so strong, and it is very easy to be bumped and damaged during transportation.

It's not as sturdy as a tin can.

But even so, this kind of glass can is also an epoch-making existence for people of this era.

And now Yang Yinuan has arranged for Yang Yuanqing to guide local workers to start firing glass.

After all, with the construction of Qianshan New Town, there are building materials such as bricks and tiles, and the demand for building materials such as glass is also increasing day by day.

After all, the doors and windows made of glass are much brighter than the doors and windows made of mulberry paper by the locals now.

And because there is already a technology for firing bricks and tiles, it is not difficult to improve the kiln with less glass.

In the manufacture of glass, it is mainly based on the raw materials.

You need to know the ratio of the main raw materials that need to be used to fire glass.

For example, quartz sand, limestone, feldspar, soda ash, boric acid, these things, what is the proportion.

When to add and so on, these are all things you need to master.

If you let the locals do it, you may have to explore for hundreds of years before you can figure it out.

But this thing is not a difficult thing for either Yang Yinuan or Yang Yuanqing.

Moreover, the mountain range where they are located, although it is not like the side of Iron Mountain City, is rich in a large amount of iron ore.

However, there are still many mineral resources such as quartz sand, limestone, and feldspar.

Earlier, when Grumman was inspecting near Thousand Hills City, he found veins of quartz sand near the quarry.

Yang Yuanqing had already organized people to mine.

The quarry sand has been shipped back to try to fire glass.

And soda ash, and boric acid, these things naturally need Yang Yinuan to purchase in the modern world.

It wasn't too hard for him.

When he came back this time, he brought a lot, and near the brick factory, Yang Yuanqing had also transformed a glass factory.

At present, we are trying to fire glass, but because the ratio of some raw materials is not very good.

Therefore, the purity of the fired glass is not particularly high.

On the one hand, it is difficult to purify local raw materials, and on the other hand, it is because the furnace temperature is not well controlled.

After all, if you put it aside in the modern world, it is not difficult for you to raise the temperature of the furnace to 1,500 degrees.

But on this planet, in this era, it is not so easy for you to raise the furnace temperature to such a high level without special fuel.

Because the temperature of this furnace is not easy to control, the transparency of the glass they are firing now is not so good.

It can only be equivalent to the level of those frosted glass on the current blue star.

However, this kind of ground glass may not be qualified for doors and windows.

But when it comes to making glass jars, it's just perfect.

Dissolve the mixture at high temperature, then put it in the abrasive to blow the air, squeeze, and basically burn the desired glass bottle.

Now their glass factory can produce some wine bottles and glass bottles.

However, the current process, and process, are still being improved.

According to Yang Yuanqing, he can fire a glass with a very high hardness.

This is the black technology of the Falken people, which is about the same thickness as ordinary glass on the blue star.

But the hardness can exceed the bulletproof glass on the blue star.

And if you use this kind of glass bottle to make cans, it is obvious that the canned bottles will be extremely hard.

But Yang Yinuan pondered, if you really want to make this kind of glass, is it a bit petty to use it to make canned food?

But now is not the time to worry about that.

Anyway, Yang Yuanqing has already produced canned bottles, and now their cans can be mass-produced.

In fact, Qianshan City has already begun to try to produce some canned food before.

It's just that what they produce here is not canned meat, but canned beef offal and haggis.

After all, most of the good meat in Qianshan City was taken back to modern times by Yang Yinuan.

It's just that a lot of sewerage is left, and these sewers are actually for the era of general nutrient deficiencies.

It is also a delicacy that most people find difficult to achieve.

It's a pity that this thing is also not resistant to storage, and even if it is made into lo-mei, it will not last as long as it can be made into canned meat.

So they boiled it for a long time, and finally made it into a kind of canned meat jelly.

This can be called stewed on the blue star, and it is a delicacy in many regions.

But here, it has become a favorite kind of meat for the poor people in Qianshan City.

On the Gao family's side, their beef and mutton were not intended to be sold to Yang Yinuan.

Even if they knew that Yang Yinuan would pay for the acquisition, they didn't plan to sell it to Yang Yinuan.

It's very simple, it is to prevent him, but he doesn't want to see his Thousand Mountain City grow rapidly.

Therefore, they would rather sell their cattle and sheep thousands of miles away to the Sixteen Cities of Yanyun than sell them to Yang Yinuan.

However, Yang Yinuan didn't care about these, but still agreed to cooperate with Gaoxin to build a cannery.

In the end, the two sides went smoothly and the cooperation between the biscuit factory and the canning factory was finalized.

And the location of these two factories was placed in Huangcaotan.

"Haha, anyway, this yellow grass beach is also a wasteland now, and it can just be rebuilt with the help of these two factories."

Gao Xin was very pleased with the progress of the negotiations today, especially when it came to placing both factories in his jurisdiction.

And after Yang Yinuan didn't object much, he was even happier.

Of course, the factory is located in Huangcaotan, and he wants to make a big head.

Workers, land, construction, etc., are all in his hands, while Yang Yinuan is mainly responsible for factory design, site supervision, and manufacturing, transportation, and installation of production equipment.

In the end, the two of them each accounted for 50 percent of the two factories......