In the evening, Qin Xiaobai spent 15,000 copper coins to buy a complete technical drawing of copper smelting made of animal skins from an NPC coppersmith in the bronze workshop. After deducting the money, he still had 20,000 copper coins left in his hand to spend.

He was originally thinking about whether to buy the drawings of the other three brothers of this NPC coppersmith and monopolize the copper smelting technology of Zhoushui Walled City. But considering that the money in his hand was enough to buy the other three copper smelting blueprints, he could only dispel this idea.

He thought about it for a while, and the copper smelting blueprint in his hand could refine copper ore into pure copper ingots. But this is a half-finished product, and no ordinary player will buy copper ingots. Therefore, copper ingots also need to be processed into other products, such as: copper swords, copper helmets, copper armor, copper halberds, etc., before ordinary players can buy them.

It seems that it is necessary to go to other workshops to buy back the manufacturing technology of various bronze equipment.

Thinking of this, Qin Xiaobai hurriedly went to the civilian residential area in the city to find a coppersmith with manufacturing technology. In addition to a bronze workshop specializing in copper smelting, there is also a copper weapons workshop and a copper armor workshop that produce all kinds of copper products.

Qin Xiaobai was looking for a coppersmith from the armor workshop.

The durability of copper products is very low, and the cost performance of copper swords is not as high as that of copper helmets and copper armor. You can see the comparison of several products sold in the merchandise. Stone Spear: Two-handed, sharp, attack 4. Durability 8.

Bronze Sword: One-handed, sharp, attack 6, durability 20.

Copper Helmet: Heavy. Head defense 5, durability 20.

Bronze Armor: Heavy, Body Defense 5, Durability 20.

Small Copper Shield: One-handed, heavy, overall defense 5, durability 20.

The durability of the stone spear is only 8, and there are about twenty assassinations, and almost one stone spear is scrapped. A sharp bronze sword can slash forty or fifty times at most. It's basically no longer sharp, and it has to be repaired and built.

A stone spear weighs only five or six copper coins, while a copper sword is as high as two hundred copper coins.

Copper helmets are as durable as copper swords. However, the durability of the Copper Helmet is much lower than that of the Copper Sword. Enemy weapons will only occasionally hit the Bronze Helmet and Armor, and more often than not, they will collide with each other's weapons. The lifespan of copper helmets and copper armor is about two or three times higher than that of copper swords.

When equipped with Bronze Armor, HP damage will be greatly reduced, and players can fight for a longer period of time without relying too much on the support of Red Medicine. As for weapons, it doesn't hurt to use a stone spear for the time being.

Qin Xiaobai inquired about the NPCs in the civilian area, and soon came to the home of a coppersmith in a copper armor workshop. It was offered to purchase the technology for the manufacture of copper helmets and copper armor.

The coppersmith was refreshed. "My lord, as long as you have the right price, it doesn't hurt to sell it to you. The small one has a copper craft, which costs at least five thousand copper coins. In addition, there are several specific manufacturing methods of bronze tools, copper spears, copper ge, copper axes, copper swords, copper knives, copper shields, copper helmets, and copper armor, each of which requires 1,000 copper coins. What do adults want to buy? ”

Qin Xiaobai was surprised: "You know how to manufacture copper weapons and armor?" ”

The coppersmith smiled: "My lord, as long as you master the manufacturing skills of copper products, you can learn the rest as long as you spend more time studying." There is not much difference between a copper weapon and a copper armor. The small one has been studied. Drawings were specially drawn and stored in the house. ”

Qin Xiaobai was also refreshed, "Okay, I'll buy your copper manufacturing skills, as well as the specific manufacturing methods of the four bronze tools, namely copper swords, copper shields, copper helmets, and copper armor." I bought them all together. ”

Coppersmith surprise. He took a few animal skins from the earthen house and showed them to Qin Xiaobai. One of the animal skins is recorded on the "Lost Wax Method Copper Mold Casting Technique". The above is the casting principle of making copper ingots into bronze objects, but the specific manufacturing method is not written above. The other four are the specific manufacturing process of the bronze sword, copper shield, copper helmet, and copper armor model, which are drawn into drawings and are very clear.

This coppersmith was so refreshing, Qin Xiaobai didn't bargain with him, and directly paid nine thousand copper coins. "I won't lower the price, but there is a requirement, you can't sell these technologies to others anymore." The coppersmith took the copper coins and said with a smile: "Don't worry, adults, with these copper coins, the little ones plan to open a new copper workshop, and they will not be taught to others." ”

Qin Xiaobai put away a drawing of the lost wax method and four drawings of the manufacture of copper utensils, and returned to the dumb shop. On the way back, he passed by Guo's mansion, and remembered that he still had a dirt house title deed left in the hands of the NPC old housekeeper in Guo's house, so he went into Guo's mansion to find the old housekeeper, returned 1010 copper coins, and retrieved the private earthen house deed.

He still had 10,000 copper coins left in his hand, which he kept to buy raw materials and run his copper workshop.

After returning to Dumb's shop, he immediately called Dumb, the old wizard, and 2 other clan NPC farmers and gathered them in the workshop to announce his latest appointment.

A bow and arrow workshop, a herb workshop, and a bow and arrow workshop in a sheep shop, all three workshops were converted into bronze workshops, one was used to process copper ore raw materials into copper ingots, and the other two were used to process copper ingots into copper weapons and armor. In the future, the core product of the tribal land is copperware.

The old wizard opened his mouth, but stopped talking, but did not say anything.

Qin Xiaobai saw it and asked, "What's wrong with the old wizard?" ”

The old wizard said: "Patriarch, the old man is a wizard, not a pharmacist, and it is nothing to withdraw the herbal medicine workshop." It's just that the old decay has no workshop, where should I study herbs and plagues in the future? ”

Qin Xiaobai said with a smile: "Our local clan camp has been established, you take care of the storefront here first." Once you've upgraded to Hero, head to the Clan's Temple, which I think you'll like even more. ”

The old wizard nodded happily.

Of course, Dumb and other NPC farmers have no opinions, and everything obeys the arrangement of the patriarch.

Qin Xiaobai arranged the task and immediately started to renovate these three workshops.

Copper smelting workshops need to set up copper smelting furnaces.

He took out the animal skin drawings of "Fire Method Copper Smelting" and built a copper smelting furnace in a workshop in Dumb's shop according to the above requirements. The shaft furnace consists of three parts: the furnace base, the furnace cylinder and the furnace body, which he specially invited from the city to build the kiln; The cross-section of the furnace cylinder is oval, the long axis is centimeter long, the short axis is centimeter long, the height is centimeter, and the volume is about cubic meters. The thickness of the furnace wall is cm. There is a "golden gate" at one end of the furnace cylinder to discharge the slag and molten copper. Below the furnace cylinder is the "furnace base". A "wind trench" is built along the long axis to form a cavity under the furnace. Wind trenches are long, wide, and deep. In different parts, the shaft furnace uses refractory materials such as kaolin and quartz sand with different formulas.

After building a copper furnace, he paid the copper money to let the NPC master who built the kiln leave. The furnace has been built, and the remaining secret recipe cannot be nbsp; It's just a copper furnace. It is also necessary to buy raw materials from the market: copper ore, charcoal, quartz pebbles. Copper ore, charcoal, and flux are mixed according to the formula, put into the furnace in batches, and reduced to metallic copper at a high temperature of about one degree.

Qin Xiaobai asked Dumb and the four NPCs to carry out these operations, and he guided them on the side.

Only five people are needed to operate this copper smelting furnace.

Half an hour later, when pure copper flowed out of the furnace, the clan NPCs were stunned and couldn't believe it. Qin Xiaobai hurriedly used the container prepared in advance to hold the liquid copper, and put it in water to cool it down and then become a large copper ingot, and these copper ingots were semi-finished products.

A cylinder of copper all flowed out.

Qin Xiaobai calculated, invested a total of 1,000 units of copper ore, and got about 5 catties of pure copper ingots, and the rest were all kinds of waste residues.

In the market, 1,000 units of copper ore are currently very cheap, and about 50 copper coins can be bought.

The copper workshops in the city sell 1 catty of pure copper ingots, about 50 copper coins, which is about 5 times higher profit. Even if the price of copper raw materials rises in the future, the increase cannot offset such a huge price difference, and the price of copper ingots will also rise.

And that's just the price of copper ingots. If it is made into copper, the price will be higher.

Qin Xiaobai also took out another copy of his "Lost Wax Method Copper Mold Casting Technique" and the drawings of the utensils model of the copper sword, helmet, armor, and copper shield. Let's get all the nbsp; Lost wax method: pit modeling, mold material is prepared by wax and butter, modeling material with lime triad and carbon mud, the ratio of wax material and copper material is one to ten. The wax is removed by heating the casting mold to form a cavity casting model, and the molten metal is poured through the channel and cooled to obtain the molded casting.

Qin Xiaobai bought some wax from the wax workshop, and bought some special soil from the market. Let Dumb look at the drawings to make a model, first to make the simplest copper sword model.

After making a model of the copper sword, a few pieces of 1 pound copper ingots were melted into liquid and poured into the copper sword mold. After cooling, a copper sword came out of the mold.

Ding Dong, system prompt: Dumb mastered the copper smelting technology and the casting copper sword technology, cast a bronze sword in the Bronze Age, became a qualified coppersmith, and was promoted to level 10.