My system is not decent

Chapter 725 Where did the original cunning go?
To identify rust, if you don't want to be too troublesome, you can also use a magnifying glass to observe.

At the part scalded by the hot needle, you will find that the jelly is melted and then solidified, forming a semicircular groove according to the shape of the hot needle.

The real bronze rust is a natural growth of mineral crystals. It will neither melt nor burn at high temperature, nor will it have sour or other peculiar smells.

If you haven't found it by doing this, take it one step closer.

At this time, you can use a knife or other tools to take a piece of the patina on the surface of the copper ware, and observe the leather shell exposed under the patina. The exposed under the pseudo-rust is directly copper-colored.

Under the bronze rust, it is generally dark brown or silver-white oxide film.

The surface of smoked copperware or dyed with pigments form a black or red oxide layer on the surface, which is often dull.

It needs to be polished with cotton cloth, blanket or basswood charcoal, and it can also be polished mechanically with a jade polishing roller.

The protruding parts of this fake oxide layer are bright, and the depressed parts are dark.

Use a dry hard cloth and other items to quickly rub the surface of the copper rust to make the surface heat up, and smell its smell.

Some pseudo-rusts will emit rosin, plastic, paint or other peculiar smells such as 502 glue.

In fact, identifying bronze wares is far from being as simple as many people imagined.

If possible, it is best to use all kinds of modern tools together, and even so, there are times when you are mistaken.

Sometimes, there are many ways to make rust, which makes people hard to guard against.

Not to mention other things, if some of the raw materials used to make porcelain are used to make rust on bronze ware, all the methods for identifying rust color mentioned above will be useless.

At this time, you can use the third-generation Charles filter in jewelry appraisal to identify patina, which is very effective.

All the patina will not change color under the filter.

Most of the various pseudo-rusts made with those green and blue chemical pigments will turn red under the color filter.

Especially the false rust fired at low temperature with enamel glaze, this kind of false rust is neither afraid of fire nor water, and neither hot needle nor water will work.

But because the blue in the enamel glaze contains cobalt, its blue or green color will turn red under the third-generation Charles filter.

Under various methods, it is easy to distinguish whether it is rust-colored or not.

Through the above methods, most of the high imitation bronzes can basically be identified.

But if you want to more accurately identify the authenticity of bronzes, you still need a lot of practical experience.

Of course, this is not something that can be learned and mastered in a day or two, and it takes a lot of hard work to develop a pair of discerning eyes.

"Lingshan type three-legged frog sun-pattern war drum of the Han Dynasty!"

"If the identification is correct, the achievement value will be increased by one!"

"General Fubo of the Han Dynasty marched to fight the big copper cauldron!"

"If the identification is correct, the achievement value will be increased by one!"

"General Fubo of the Han Dynasty marched to fight a small copper cauldron!"

"If the identification is correct, the achievement value will be increased by one!"

It is not easy to add three achievement points, especially the description of the last two cauldrons is more accurate.

Because at that time, it was the South China Sea Island that was pacified by General Fubo.

This indirectly proves that Wu Er is not lying, and that these three things are indeed from Nanhai Island.

After confirming that the item was genuine, Chen Wenzhe began to feel distressed.

Wu Er, this bastard, actually carried these three national treasures manually to the antique city?

Thinking about the transportation process, there is no special treatment for these three national treasures, right?

You know, the transportation of cultural relics is comparable to the transportation of gold!

According to the relevant regulations of our country, the requirements for transshipment of cultural relics are extremely strict, which is equivalent to the transportation of gold.

If the national treasure-level bronzes are transported, relevant departments must be required along the way to make an exception to "open the way" for precious cultural relics.

In addition, to transport national treasure bronzes, a wooden box must be tailored for it, and foam as thick as 10 cm must be added inside to ensure that the cultural relics will not be damaged again.

Now there are no such protective measures. Therefore, for these bronzes that were already severely damaged, they must have been injured twice, or even three times or four times.

Of course, maybe it's not just Wu Er who caused the damage to them, but also their original owners. I'm afraid they didn't think about protecting the transportation, did they?

After all, it is copper, so how can it be so delicate?This is probably the common thinking of all ordinary people, right?

Perhaps seeing Chen Wenzhe's distress, Wu Er was a little startled.

"Brother, isn't there a problem?"

Wu Er had to worry, he had contacted Chen Wenzhe several times, and he also knew that Chen Wenzhe would not tell lies.

Of course, if it is your own problem, people will not remind you.

However, as long as you ask, generally Chen Wenzhe will not cover up lying.

"There must be a problem. With such a serious injury, the price must not be high!" Chen Wenzhe said directly.

"The damage was already there, and I didn't want to sell it for tens of millions!" Wu Er was relieved.

Chen Wenzhe glanced at Wu Er, don't want to sell tens of millions?

He thought, but can it be sold at this price?
Although these three bronze wares belong to real treasures and are of high value, it is really impossible for each of them to sell for tens of millions.

The main reason is that it is poorly preserved. Even if it is big and exquisitely crafted, it still loses a lot of points.

Looking at the three-legged frog pattern missing from the bronze drum, as well as the bottom feet, these are all corroded.

It is not difficult to repair it, but after repairing, it will definitely not work again.

But those two copper kettles, after repair, can still be used to cook and eat!
In the repair process, the principle of repairing the old as the old must be followed, and harmful reagents must not be used.

In this way, the integrity of the copper kettle and drum is guaranteed to the greatest extent through the combination of physical methods and chemical methods.

It is not too troublesome to restore. The 1 mm thick copper plate drawing is used, which is cut and made, bonded with epoxy resin, and finally made old by priming.

Of course, there are still a lot of craftsmanship in it, and none of them can be dispensed with.

The rust should be removed first, then the gaps should be filled, the base should be grounded, and finally the rust should be done.

As long as these four procedures are completed, the restoration of these copper kettles and drums can be completed in about a few days.

"Boss, boss"

Li Jinli's palm kept shaking in front of Chen Wenzhe's eyes, but his eyes didn't have any focal length!

"What are you doing?" After being slapped, Chen Wenzhe came back to his senses.

"Boss, what are you thinking? This distraction is too serious? Those who don't know think you are bewitched!" Li Jinli said helplessly.

With the performance of his own boss, Wu Er didn't raise the price desperately?
I don't know where the original cunning of the boss has gone?How did you act so substandard?

Chen Wenzhe came back to his senses, and said indifferently: "I'm just thinking about how to repair these three bronze wares. Such defects cannot be repaired by ordinary people!"

(End of this chapter)