Even though his value is different now, Hou Baoguo still does not forget his original intention. He will give him a sincere price whenever he comes to sell antiques.

Zhang Kun strode towards the counter: "Boss Hou."

Listening to Zhang Kun's greeting, Hou Baoguo put down the newspaper, raised his head, looked at Zhang Kun with a smile on his face: "This boss wants something, everything is on the shelf. If you like something, just say hello."

While speaking, a guy from Yulaifang brought a cup of hot tea to Zhang Kun and Qi Xiangyang.

Zhang Kun took a sip, then put down the cup, and looked at Hou Baoguo with a smile: "Boss Hou, I want to disturb you today. I want to borrow a carving knife from you and use it. I also need to light boiling water and vinegar. I wonder if it can be convenient?"

When Hou Baoguo heard that Zhang Kun was not here to buy things, the smile on his face did not change at all, and he nodded: "Small matter, Xiao Liu, help the boss get a carving knife, and prepare to light boiling water and vinegar."

"Oh, it's time!" The guy who just poured tea for Zhang Kun and Qi Xiangyang responded quickly, and then one minute later, he walked over with a carving knife, a bowl of boiling water, and a stack of vinegar.

These things are generally available for merchants in Panjiayuan, and are considered one of the essential products in the antique industry.

Zhang Kun smiled and nodded to the clerk to show his gratitude. He then took the carving knife and water and vinegar, went to the sofa in the next lounge area, sat down without a trace, and then took out the copper coin he had just bought.

He took the copper coin out of the gift bag, and then Zhang Kun looked carefully for a while. The hard green rust plate on the surface of the copper coin had become blocks, covering the entire body of the coin. There was no sign of the handwriting under the coin at all, so Zhang Kun could not tell what kind of copper coin it was for a moment.

However, since it was selected by Yao Zhiping, it would definitely not be wrong. No matter what kind of copper coin it is, it is at least valuable.

Without saying a word, Zhang Kun listened to Yao Zhiping next to him explaining the cleaning steps, then picked up the carving knife, scraping the carving knife with his thumb. The blade was very thin and sharp, and there was no problem. So Zhang Kun carefully carved the copper coins with the carving knife.

The carving knife is the type used for seals, which is very small and sharp. It was the first time Zhang Kun used it, but at this time Zhang Kun was inexplicably skilled in holding it in his hand. Because this carving knife is very similar to the scalpel used by Zhang Kun in the hospital, the techniques are basically the same when used, so Zhang Kun is very easy to use.

Zhang Kun held a carving knife and pointed it at the edge of the coin. He gently dug the bottom of the rust blocks to remove the rust on the surface of the copper coin bit by bit. If you encounter something that cannot be dug at that time, Zhang Kun did not rush and put it aside for the time being and removed the other rust blocks that could be removed first.

A few minutes later, there was only a large piece of rust left on the surface of the copper coin that could not be dug. Zhang Kun looked at a towel for wiping the table at the coffee table, so he took it up and spread it flat on the coffee table. Then he placed the copper coin on the towel. Then, he held the carving knife, aimed it at the rust block, picked up the hammer given by the guy next to him, and gently tapped it.

After hitting it for a few seconds, the solidified rust began to loosen slightly. Zhang Kun put down the small hammer and continued to peel off the edge of the rust bit by bit. Finally, the entire rust broke away from the copper coin, and then revealed the appearance below.

Although the huge rust blocks have broken away, the surface of the coin is still blurred, as if it is covered with a layer of earthy yellow floating soil, and the handwriting on it cannot be seen clearly.

Zhang Kun put down the carving knife, then carefully picked up the copper coins and put them in the still steaming boiling water next to him.

The boiling water in the bowl was just taken out, and the temperature was about 80 to 90. Put the copper coins into hot water and then slowly sink. Zhang Kun did not do anything else, so he soaked the copper coins in boiling water for five or six minutes, and then took it out.

After taking it out, the guy next to him handed over a brush at the right time. Zhang Kun smiled gratefully and took it, and then used a small brush to gently wash the floating soil on the surface of the coins.

This layer of earthy yellow floating soil is actually not real soil, but a mixture of soil and copper rust. In the antique circle, it is called earthy rust, which is an alkaline hard sticky floating substance.

The entire coin was washed twice, and then placed it next to it and dried it. At this time, the handwriting on the surface of the copper coin was finally revealed, and the four words "Hongwu Tongbao" could be vaguely seen.

But this is not over yet. After Zhang Kun waited for the coins to dry, he picked up the coins and put them in the vinegar dish next to him. He soaked them for more than ten minutes. Finally, he took them out and put them in the water next to him to wash them. At this time, the handwriting on the surface of the copper coins became more and more clean and the patterns were obvious.

After drying, Zhang Kun took the copper coins and looked carefully, and finally nodded with satisfaction. He basically looked like an ancient coin. Although his appearance was not good, it was completely incomparable to the previous earth bumps.

In just half an hour, Zhang Kun used the five methods of removing rust by coin, boiling water soaking and vinegar soaking methods commonly used in the antique industry, and the time control is very good.

Of course, if Zhang Kun could give him more time, Zhang Kun could do better, but for now, this is enough.

"Little brother, you have a good grasp of the knife skills. You are an expert." Hou Baoguo came to the sofa at some point. After watching Zhang Kun finish cleaning, he smiled with an sigh.

The copper rust blocks were completely removed from the copper coins after Zhang Kun's knife scraping, and did not hurt the money body at all. There was no small scratch. This kind of knife skill could not achieve this level without a few years of skill.

However, this result is natural.

Although this is the first time Zhang Kun uses the knife, he has touched the knife for many times.

The human body is so delicate. Zhang Kun often needs to perform craniotomy with a scalpel, which is accurate to a few millimeters or even a few millimeters. Any slight error may cause irreparable scars to the patient.

Therefore, Zhang Kun is naturally more comfortable with the fineness on the operating table.

You know, Zhang Kun took over the title of Ye Tiannan Central Hospital as the first knife. His hands were absolutely nothing to say.

Zhang Kun smiled in the face of Hou Baoguo's praise, and then sent the copper coins that were wiped clean in his hand to Hou Baoguo: "How about you help Boss Hou?"

Hou Baoguo did not refuse, and took it with a smile, then picked up the magnifying glass handed over by the friend next to him, and carefully observed it. About two minutes later, Hou Baoguo smiled and raised his head: "Hongwu big money, get three, and carry it to Zhejiang."

Zhang Kun nodded with a smile: "Boss Hou, please help me estimate the price."

Hou Baoguo pondered for a while, then said, "Hongwu's big money is indeed good, but this one is of a little different quality. If I want me to collect it... two thousand yuan!"
Chapter completed!