- At lunch.
The laurau I made was very popular.
"Whoa! Hmm!"
Asari sand dropped her cheeks,
"It's delicious because the flavor is mixed with the good feeling"
The pears were also eating with a bright expression.
"It's just steamed with leaves, but it's so different?
Saori was surprised to learn how to cook.
I couldn't move with my period a few hours ago, but now I look fine.
I saw a dish I didn't know, and I was completely revived.
Nevertheless, I'll have you rest as long as possible today.
It is menstrual leave until the day after tomorrow.
"As usual, if the flavor is too thin, adjust with salt."
We use salt when there is a gap.
It's cherished because it doesn't take much effort to refine.
"I'm not saying salt!
Subari sand pinched the salt, and covered it with laurah.
Then I ate the pork again and said, "Nmmh!" He screamed.
I tried salting it the same way, but the taste was really outstanding.
Once again, I think salt is really capable.
Speaking of which, I was curious.
When the meal was almost over, the pears asked.
"Why don't you make iron?
"Eh, can you make iron!?" and amazing vegetables.
Shiori said, "I thought I couldn't make it if I didn't make it at all."
"I think we can make it. Isn't that right? Fire Shadow"
"The pears are right. You can make iron."
Consistent use of bronze is not due to the inability to make iron.
With us now, we can make iron if we want to.
"Of course, there's a reason not to make it."
I pinched my right index finger.
"One of the reasons is to take safety into account. Making iron requires a much higher temperature flame than a normal fire. Of course, no matter how careful you are, there is a risk of burns... there will be burns. And the injury is much more serious than just a burn. Anyway, the temperature needed to make steel is over 2,000 degrees."
"" "Nhhhhhhhh!?
"The fire that burns there is around 300 degrees in Mt. Seki. In other words, it's about seven times hotter by simple calculation. If you touch it badly, you won't get hurt. But this is the Celsius temperature... the so-called Celsius temperature, which is about four times the absolute temperature used in chemistry."
"It's so hot anyway."
That's what I'm talking about.
The most important reason not to make iron is for safety reasons.
"Is there another reason for that?" and pears.
"Yes, I do. The second reason is that it takes a lot of work to make.
As I said earlier, steel manufacturing requires a flame that exceeds 2,000 degrees. In order to achieve this, various foundations need to be created. We will need equipment, commonly called blast furnaces, but it is difficult to build them. Considering our number of people, just building a blast furnace will be enough and you won't be able to do any other work. "
I see.
In addition to safety, it is also laborious.
In addition...
"Finally, for three reasons, the world is easy to mass produce bronze."
"What do you mean?
"Actually, you can't make bronze with a fire. Since the main component, copper, has a melting point of about 1100 degrees, a flame of up to 1100 degrees is normally required. We need quite a fine furnace, not even a blast furnace, to make it happen."
"But we don't have such a fine furnace, do we? After all, there is a fire power up device made by a fire shadow outside of Asia. Are you making a 1100-degree flame with that?
A thermal booster is an improvised furnace.
Stone piled in the shape of a pyramid, filled with soil or clay and hardened with holes.
The apex has a chimney and the bottom has an outlet for material.
It is rare to call it a lump iron furnace, but it is possible to increase the firepower.
"No, I didn't make it. The firepower of that furnace is probably 600 degrees."
"There was so much."
Although surprised, the pear continued, "But it's not enough at 1100 degrees."
"The furnace was built for ease of use. It's easy to make and never high performance. Meiko's tool for delivering oxygen to me... it's called Huigo, but if you prepare a lot more of that and pour in gungun oxygen, it could be 800 or 900 degrees.
But if it's 600 degrees, we can make bronze here. "
"Why?"
"The stone we use to make bronze ware is bronze in the first place."
"Bronze stone? Does that exist?
"exists in this world."
Bronze is an alloy of copper and tin.
A mixture of tin having a melting point of about 230 degrees relative to copper having a melting point of about 1100 degrees.
When it comes to why it is mixed, copper alone is too soft.
And the resulting bronze melting point is about 900 degrees.
Originally, bronze can only be mixed with copper and tin.
However, there was a mixture of bronze stones in the world from the beginning.
Moreover, the bronze stone has a very high tin content.
Therefore, the melting point was less than 600 degrees.
"The bronze we make is technically different from the bronze we learn in history classes. Bronze is bronze, but it has an infinitely high ratio of tin. That's why we can process it just by strengthening the fire a little bit."
Bronze stones are falling in large quantities. Near Shinomiya Cave.
Of course, the quality is slightly wider because it is a natural product.
This is mainly the case when the copper component is too high and the firepower is too severe.
In that case, you can add tin and lead to lower the melting point.
"That's why we don't have much benefit in steel making. Even with history, iron was replaced by bronze because it was possible to produce iron cheaply and in large quantities, so I shouldn't force myself to switch to iron."
I see. Listening to this kind of talk gives me peace of mind that the fire shadow is good as a leader. "
Pear said that everyone shook their necks wide and vertically.
"Now, let's stop talking and start the afternoon activities."
"" "" Oh!
As we finished talking about steel making, the next activity began.