"You ......"

After hearing this, Zhang Bo's face was gloomy, he sneered, and retorted: "Lao Li, what do you mean by this? Are you questioning my decision?"

A few steps forward, forced to ask: "I took a lot of effort to ask Master Su to help, even if the ancient sword repair is different from the sword casting, but after all, it has the same origin and the same root, not to mention that with Master Su's strength, is he not qualified to give advice?"

Looking at the disapproving expression of his sworn enemy, he snorted coldly: "Okay, since you look down on others, how about you take full responsibility for this job?"

A trace of anger flashed in Li Guangming's eyes, he didn't expect Zhang Bo, who usually laughed, to dare to turn his face in public for an outsider?

Just wanted to speak, Zhao Xu next to him saw that the signs were wrong, although the two of them usually fought openly and secretly for many years, they couldn't let outsiders see the jokes, so they hurriedly said: "Since it is definitely a good thing that the famous Judge Su is willing to help, everyone is for work, wouldn't it be better to brainstorm?"

Zhang Bo and Li Guangming glanced at each other, and they didn't speak anymore, Su Yuan pursed his lips, it was easy to come to the Forbidden City once, and he actually met such a moth, and said in a deep voice: "Can the Nine Dragon Sword let Su have a look?"

Zhang Bo heard Su Yuan's displeasure, and hurriedly smiled: "That's natural, please come with me." ”

Li Guangming still wanted to speak, but was grabbed by Zhao Xu, shook his head gently, Li Guangming snorted lightly, looked at the back of Su Yuan and the others leaving, and slowly followed, ready to act at the opportunity.

"This is the Nine Dragons Sword?"

Open the safe, a badly corroded long sword appeared in front of everyone, the sword body was rusty, the blade even had many chips, the gems on the gauntlet were scattered, where was there a trace of royal majesty?

Zhang Bo looked at Su Yuan's expressionless face, and said helplessly: "Hey, there's no way, after the fire and decades of deep burial in the ground, it is a great luck to be able to keep it in its original state." The gem accessories are easy to solve, mainly because the sword body is seriously corroded, plus it is re-polished, so it ......"

Su Yuan waved his hand and picked up the Nine Dragons Sword, although the surface was rusty in his eyes, he could still see the slightest golden light flashing, worthy of being a treasure that Qianlong had to bury with him when he was dying, a rare boutique.

Li Guangming looked at Su Yuan silently, and secretly smug in his heart, what kind of bullshit sword casting master you are, now it's a cultural relic restoration, you hairy boy knows a fart!

Although most of the bronzes displayed in the museum are relatively intact, they are treated and restored before meeting with the audience, and when the newly unearthed bronzes are buried underground, due to the collapse of the tomb, stratum changes and other reasons, many of them will be squeezed and deformed, or even broken, and the complete bronzes unearthed in the cellar are rare.

A newly unearthed bronze artifact must first take a bath, that is, to remove the attachments on the surface of the artifact, and bathing the cultural relics is a technical job.

This can't be done by soaking in water, which can be washed, which can't be washed, whether it can be washed, whether it can be washed, this is all knowledge.

Fragile bronzes need to be handled with caution and, if necessary, temporary reinforcement measures should be taken. Cleaning is mainly done by physical methods, supplemented by chemical methods and other means. In particular, the presence of harmful rust must be specifically treated according to a specific hazardous rust treatment process.

As far as the Nine Dragon Sword is concerned, it looks rusty, but it has been the result of many cleanings. Li Guangming showed a contemptuous smile, this is not the cleaner the better, the surface of the rust must not be removed, once the metallic color of the body is exposed, it will be considered gone.

Generally speaking, it is sufficient to remove surface dirt, induration, swelling and loose corrosion products, soluble salts and chlorides. The dense and uniform surface layer of harmless rust and important valuable traces should be retained, and finally a uniform and beautiful surface layer is obtained.

What's more, the Nine Dragons Sword is not just a problem of rust, the slight deformation of the bronze due to the action of natural forces, manpower, etc., is nine times out of ten, so it is necessary to apply an opposite force to the deformed part to restore its original appearance.

This is not an easy task, most of the bronzes are thousands of years old, old arms and legs, do not dare to break casually, if you are not careful, there will be new breaks.

Therefore, before shaping, it is necessary to combine the results of instrument analysis, and then determine the shaping method according to the type of artifact, the degree of deformation, the deformation part, the properties of the metal, etc., which is extremely difficult to adapt to local conditions.

Even if you can get rid of the rusty spots of the Nine Dragons Sword, but the sword body is still slightly deformed, plus the sword blade has seven or eight collapses, Li Guangming sneered, look at how you hairy boy can solve it!

Zhang Bo took a deep breath and explained: "Rust spots are the first problem, followed by deformation and chipping. The simple supplement is that the copper sheet or resin is directly glued, and the resin and copper skin will also be used to supplement the copper skin, the copper skin ensures the strength and weight, and the resin guarantees the decoration, and each takes the use. ”

"The missing parts that are a little more complex need to be turned to cast, and the casting materials are resin, copper and tin-lead alloys. But for the Nine Dragon Sword, it is not very suitable, so the plan has not been decided. ”

"That's why I suggest the welding method!" Li Guangming took a few steps forward and said loudly: "Welding technology is required for both repair and shaping to make the collapse disappear, so as to achieve the structural stability and aesthetic integrity of the Nine Dragon Sword, which is the most perfect repair plan." ”

"Hmph, perfect?" Zhang Bo sneered after hearing this: "Then do you say that argon arc welding or laser welding is used?"

"Don't you see the purple-brown color without metallic luster after the ballast file at the fracture position? It means that the metal is completely mineralized, and this situation can only take the adhesive process, in case there is a problem with the welding, you dare to take full responsibility?"

Li Guangming's face sank like water, and he did not refute, after all, what Zhang Bo said made sense, and it was not a problem to replace it with other cultural relics, whether it was welded or adhered to, but the Nine Dragon Sword was a first-class cultural relic, and its reputation was too great, and the leaders must ask for perfect restoration, and they were also ready to be exhibited to the outside world, and even as a treasure of the Forbidden City.

This is the main reason why the plan is so uncertain, and no one dares to take full responsibility. Several weapons experts are basically inclined to Zhang Bo's opinion, and be conservative and safe.

Su Yuan put down the Nine Dragons Sword gently, and finally spoke: "Traditional restoration pays attention to repairing the old as the old, and it is necessary to make the repair part and the surrounding connection naturally integrated, which is also in line with the aesthetic needs of the general audience." The method of following the color depends on the condition of the rust, whether it is "bone rust", "pimple rust", "lacquer ancient earth" or "mercury Qin", the situation is different. ”

As soon as these words came out, the three experts present looked at each other, especially Zhang Bo, and asked in surprise: "Is the master really sure?"

Su Yuan turned around and said with a slight smile: "Since Su dares to come, he naturally has something to rely on, but he needs a lot of secret recipes to cooperate, and the environment of the Forbidden City is ......."

Zhang Bo hurriedly said: "Master rest assured, as long as you are sure, everything else is not a problem, you see ......"

"Wait!" Before he finished speaking, Li Guangming suddenly interrupted: "Zhang Bo, even if you are sincere in your meritorious service, have you even forgotten the rules of the Forbidden City?"

Looking at Su Yuan, he said sharply: "The Nine Dragons Sword is a first-class cultural relic, and if it is repaired, it must be a national treasure, a heavy weapon that restricts leaving the country!