My system is not decent

Chapter 1818 Listen to the sound to see the shape, distinguish the rust and smell

For bronze mirrors, silver backs are the top grade, followed by lead backs, followed by green and green mirrors.

If the lead back is buried in the soil for a long time, it will become pure black, which is called a black lacquer back. The price is particularly high, but this color is also easier to fake.

On this basis, you can also distinguish the authenticity of the bronze mirror from several aspects such as listening to the sound, looking at the shape, distinguishing rust, and smelling the smell.

Listening to the sound is to distinguish the authenticity from the sound made by knocking on the bronze mirror.

Because the proportions of copper, tin, lead and other raw materials are different when the new and old bronze mirrors are made, the sounds they emit are different.

There is a big difference in sound between the newly imitated bronze mirror and the old one.

In addition to the identification of sound, "looking at the shape" is also an aspect of identifying bronze mirrors.

A bronze mirror over 20 centimeters is basically a plane.

The curvature of the large bronze mirror is very large, and the curvature of the small bronze mirror shrinks unnaturally.

Therefore, the people and scenery reflected in the imitation bronze mirror are often unclear or even distorted.

In addition to "looking at the shape", distinguishing the rust and copper taste on the bronze mirror can also identify the authenticity of the bronze mirror.

In terms of rust, the rust of the newly imitated bronze mirror is done later.

After taking some chemical action, or scratching off the rust on some old copperware, use glue to stick it on it, and you can distinguish it with water.

If you put an imitation bronze mirror in water, several things will happen.

One situation is that it does not touch water, and the place where there is rust does not touch water, and it is against the water, just like the feeling of lotus leaves being wet.

After being soaked in water, the newly imitated bronze mirrors have several smells, one is sulfuric acid;

Even a bronze mirror made of freshly smelted copper has a coppery smell.

Old bronze mirrors generally have a copper fragrance. The copper fragrance mentioned here is the earthy fragrance after unearthed.

In addition to these identification methods, there is listening to the sound.

Knock the bronze mirror with your hand, and distinguish the authenticity from the sound made by the bronze mirror.

Because the proportions of raw materials such as copper, tin, and lead are different in the production of new and old bronze mirrors.

Therefore, the sound it makes is also different.

Old bronze mirrors generally have a deep and mellow voice.

The sound of the newly imitated bronze mirror is relatively crisp, even harsh.

No matter what kind of bronze ware, there are several ways to distinguish the authenticity.

In addition to listening to the sound, it is to look at the shape.

Observe the shape of the bronze mirror, and distinguish the authenticity of the bronze mirror from the shape.

In order to ensure that the bronze mirror can have a real and clear effect, the ancients had a strict proportional relationship between the size and the radian of the bronze mirror when casting it.

Generally speaking, a smaller bronze mirror can see a relatively gentle arc, and a bronze mirror over 20 cm is basically a plane without obvious arc fluctuations.

The curvature of the newly imitated bronze mirror is generally out of proportion to the size of the mirror.

Then there is rust identification, which is especially important to identify authenticity on bronze ware.

The rust on the newly imitated bronze mirror is made later, and there are several situations that will occur when it is placed in water. One situation is that it does not stick to water.

Where there is rust, it does not stick to water, and it is against the water, just like the feeling of a lotus leaf soaking in water.

Of course, there are too many ways to look at rust, because there are more ways to make rust in antiques.

When Chen Wenzhe appraised that bronze youte before, he had already seen it and studied it systematically.

On top of the identification of the bronze mirror, those fraudulent methods and identification methods are also figured out.

And different, there are some subtleties, such as smell.

After dipping the bronze mirror in water, smell it with your nose. The newly imitated bronze mirror usually has the smell of sulfuric acid, the smell of burning with alkali, and the smell of copper.

Old bronze mirrors generally have a copper fragrance, which is the earthy fragrance after unearthed.

After a series of identification methods are used, and the authenticity is identified, the next step is to judge the value of the ancient bronze mirror.

Bronze mirror is a kind of daily necessities used by the ancients to decorate and groom. It is a treasure in the ancient cultural heritage of our country.

So, how can we collect the desired bronze mirror?

In fact, to judge the value of ancient bronze mirrors, it can be done through the simple eight words of "listening to see the shape" and "identifying the rust and smell".

A real collection of good products must have high artistic and historical significance.

Only fine collections can become the object of everyone's pursuit, and the appreciation potential is the most limitless.

Therefore, many collectors believe that to judge the collection value of a bronze mirror, the following four points can generally be considered.

First, it is highly artistic, reflecting ancient high-tech such as Warring States hollow mirrors, Han and Tang gilt mirrors, mother-of-pearl inlays, gold shells, silver shells, leg-through mirrors and other special craft mirrors;

Second, the variety is rare, and it is best to witness a historical event, such as the polo mirror in the Tang Dynasty, which proves that football originated in China;

Third, the state of preservation is good. Since the bronze mirror has been buried for a long time, the less rusted the better;

Fourth, the clarity of the ornamentation is the key. In the collection of bronze mirrors, we pay attention to the molds, and the head mold mirrors are the most popular.

After identifying the authenticity, determining the collection value, and obtaining the bronze mirror, how to maintain the bronze mirror becomes another problem.

If it was in other places, Chen Wenzhe would never have thought of this.

However, he is now in a bronze mirror museum, and all of them are antique bronze mirrors.

The imitation is too good, and it needs maintenance. After all, even if it is an imitation, its value is also very high.

Such an antique bronze mirror naturally needs to be well protected.

Especially the rust color made must be better protected.

The rust color on bronze ancient mirrors should generally be kept as original as possible, because most of them are harmless rust.

If it is genuine, it is necessary to remove the rust when sometimes the ancient mirror rusts into lumps and the coin text cannot be recognized, or when there is harmful rust.

Generally, soil rust is a mixture of soil and calcium and magnesium salts, or a mixture of soil and copper rust.

Before processing, dip a soft brush in water and gently brush off the dirt on the ancient coins.

Then dip it into a dilute solution of glacial acetic acid.

Glacial acetic acid is a colorless and transparent acidic chemical solvent originally used in photography darkrooms.

After an hour, lightly touch the blocky ancient mirror with a small wooden stick until it disperses.

Then put on rubber gloves, hold the ancient mirror in one hand, and gently scrub with a brush in the other.

Generally, for ancient mirrors without inscriptions and marks, it is not necessary to wipe off the patina on the back, so as to maintain some characteristics of the unearthed ancient coins.

After rust removal, put it in clean water, rinse off the glacial acetic acid solution, absorb the water with a soft towel or cloth, and finally spread it flat on a clean paper to dry.

In the absence of conditions, it can also be soaked in vinegar to remove rust.

This rust removal method takes about a day and night to barely dissolve the copper rust, and the efficiency is extremely poor.

For the powdery rust that soaking method can't do anything about, you can surround the derusting part with oil sludge, use a dropper to drop concentrated acetic acid to decompose the rust, then gently remove the rust with a needle tip, scrub it with water, and neutralize it with ammonium hydroxide.

(End of this chapter)