Master descends to earth

Chapter 103 Three Big Problems
"you……"

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

A few steps forward, he asked forcefully: "I have worked so hard to ask Master Su to help me. Even if there is a difference between repairing ancient swords and casting swords, they have the same origin and root after all. What's more, with Master Su's strength, is he not qualified to give advice? ?”

Looking at the disapproving expression of his arch-rival, he snorted coldly and said, "Okay, since you look down on others, why don't you take full responsibility for this job?"

A flash of anger flashed in Li Guangming's eyes, he didn't expect that Zhang Bo, who is usually smiling, would dare to turn against him in public because of an outsider?
Just as he was about to speak, Zhao Xu, who was next to him, saw that something was wrong. Although the two had been fighting openly and secretly for many years, they couldn't let outsiders see the jokes. Wouldn't it be better to brainstorm?"

Zhang Bo and Li Guangming looked at each other, and they didn't speak anymore. Su Yuan curled his lips, and finally came to the Forbidden City, but met such a moth, and said in a deep voice, "Can Su Mou see the Nine Dragon Sword?"

Hearing Su Yuan's displeasure, Zhang Bo quickly smiled and said, "Naturally, please follow me."

Li Guangming still wanted to speak, but Zhao Xu grabbed him and shook his head lightly. Li Guangming snorted softly, watched Su Yuan and the others leave, and followed slowly, ready to play by ear.

"Is this the Nine Dragon Sword?"

Opening the safe, a severely corroded long sword appeared in front of everyone. The body of the sword was full of rust, and the blade even had many cracks.
Looking at Su Yuan's expressionless face, Zhang Bo said helplessly, "Hey, there's no way. After going through the fire and decades of deep burial, it's a blessing to be able to keep the original shape. Gem accessories are easy to solve, mainly because the sword body is severely corroded. Re-sharpened, so..."

Su Yuan waved his hand and picked up the Nine Dragon Sword. In his eyes, although the surface was rusty, he could still see the golden light shining. It was indeed the treasure that Qianlong would be buried with when he died, and a rare masterpiece.

Li Guangming looked at Su Yuan silently, secretly complacent in his heart, don't care what kind of bullshit swordsmith you are, but now you are a restoration of cultural relics, you are a brat who knows nothing!

Although most of the bronzes displayed in the museum are relatively intact, they are all processed and repaired before meeting the audience. When the newly unearthed bronzes are buried in the ground, due to the collapse of the tomb and changes in the stratum, many of them will be squeezed, deformed, or even broken. , that kind of unearthed complete bronzes are rare.

A bronze ware that has just been unearthed must first be bathed, that is, to remove the attachments on the surface of the vessel. Bathing cultural relics is a technical job.

This can't be just soaked in water and rubbed. What can be washed, what can't be washed, and whether it can be washed with water are all knowledge.

The fragile bronzes need to be handled carefully, and temporary reinforcement measures should be taken if necessary.Cleaning mainly adopts physical methods, supplemented by other means such as chemical methods.Especially the existence of harmful rust, it must be specially dealt with according to the specific harmful rust treatment process.

As far as the Nine Dragon Sword is concerned, it looks rusty, but it is the result of many times of cleaning.Li Guangming showed a contemptuous smile. The cleaner the better, the rust on the surface must not be completely removed. Once the metal color of the body is exposed, it will be considered as gone.

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

What's more, the Jiulong Sword is not just a problem of rusting. Bronze ware is slightly deformed due to natural forces, human forces, etc., 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 bronze wares are thousands of years old, with old arms and legs, so you dare not break them casually, and new fragments will appear if you are not careful.

Therefore, before plastic surgery, the results of instrumental analysis must be combined, and the plastic surgery method should be determined according to the type of object, degree of deformation, deformed part, and metal properties. It is extremely difficult to adapt measures to local conditions.

Even if the rust spots on the Nine Dragon Sword can be fixed, the body of the sword is still slightly deformed, and the edge of the sword is broken in seven or eight places. Li Guangming sneered, let's see how you, a brat, can solve it!

Zhang Bo took a deep breath and explained: "Rust spots are the first problem, followed by deformation and cracking. The simple supplement is to stick copper sheet or resin directly, and also use resin and copper skin to supplement the method. The copper skin guarantees the strength. Weight, resin guarantee decoration, take what you want."

"The missing parts that are more complicated need to be over-molded. The casting materials include resin, copper and tin-lead alloy. But for the Nine Dragon Sword, none of them are suitable, so the plan has not been finalized."

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

"Hmph, perfect?" Zhang Bo sneered and said, "Then do you mean argon arc welding or laser welding?"

"Didn't you see the purple-brown color without metallic luster after the slag was filed at the crack? It means that the metal is completely mineralized. In this case, the only way to do it is by bonding. If there is a problem with the welding, do you dare to take full responsibility?"

Li Guangming's face was watery, and he didn't refute. After all, what Zhang Bo said made sense. It would not be a problem to replace it with other cultural relics, whether it was welded or glued. On display, even as a treasure of the Forbidden City.

This is the main reason why the plan has not been determined for a long time, and no one dares to take full responsibility.Several weapons experts are basically inclined to Zhang Bo's opinion, be conservative and safe.

Su Yuan gently put down the Nine Dragon Sword, and finally said: "Traditional repairs pay attention to restoring the old as before, and make the repaired parts and the surroundings seamlessly integrated, which is also in line with the aesthetic needs of ordinary audiences. The method of color depends on the state of rust. Whether it is "sticking bone rust", "pimple rust", "lacquered ancient ground" or "mercury Qin", the situation is different."

As soon as this remark came out, the three experts present looked at each other in blank dismay, especially Zhang Bo, and asked in surprise, "Could the master really be sure?"

Su Yuan turned around and said with a slight smile: "Since Su dared to come, he naturally has something to rely on, but it needs the cooperation of many secret recipes. The environment of the Forbidden City..."

Zhang Bo hurriedly said: "Master, don't worry, as long as you are sure, everything else is fine. Look..."

"Wait!" Before he finished speaking, Li Guangming suddenly interrupted: "Zhang Bo, even if you are eager to make contributions, have you even forgotten the rules of the Forbidden City?"

Looking at Su Yuan, he said sharply: "The Nine Dragon Sword is a first-class cultural relic, and it must be a national treasure if it is restored. It is a heavy weapon that is restricted from leaving the country! Based on your words from Judge Su, do you want to take it out?"

(End of this chapter)