My system is not decent

Chapter 1229 Simple does not mean easy identification
It is definitely rare to use hand-plated porcelain to remove the fire, which is time-consuming and labor-intensive, and must be careful and thoughtful.

After all, modern people are eager for quick success. Who would spend months on a piece of porcelain?

However, if there are really masters who do this, ordinary people really can't identify it.

And the old porcelain made in this way must be of high value!
For money, what price can modern people not pay?

Therefore, there is a faster way to make old.

If you want to achieve a good effect faster, then use the water grinding method to remove the fire.

Put the utensils under the flowing water and rub the glazed surface with the flowing water to eliminate the "fire light".

For a finer finish, use the oil grinding method.

First rub it lightly with a pulp mound, then use a kraft rubber rudder, and rub it with oil to eliminate fine marks and make the glaze smooth and moist.

If the mind is more poisonous and frenzied, use the acid leaching method.

Because the glaze of the ceramic is silicate, it forms a transparent glass-like glaze with a beautiful luster.

Using acetic acid, hydrofluoric acid, nitric acid, oxalic acid, etc., which can react with silicate, soaking porcelain can cause glaze corrosion.

This can also make the glaze dull and cloudy, thereby eliminating the "fire".

Some do not soak, directly use a rag dipped in acid to wipe the glaze repeatedly, and the effect can also be achieved.

The disadvantage of this method is that the acid corrodes the glaze surface too strongly, making the glaze color devitrified, the luster is too dim, and even milky.

This is very different from the "clam light" that has accumulated over the years and formed naturally.

Under a high-power magnifying glass, countless small holes that have been corroded by acid can be seen.

Why do you say that doing this is a bit crazy, because these small holes that are corroded are destroying porcelain, which is killing chickens to get eggs.

Of course, there are also compromise methods, such as mixed dipping.

This is several solutions mixed together for use.

For example, after leaching with acetic acid, use tea water, plant ash water, etc.

This will not only eliminate the "flare", but also make various stains, which makes people mistakenly think that it is caused by long-term use.

Glazed pottery and porcelain with high water absorption rate, after acetic acid treatment, the residue is easily absorbed by the carcass.

Washing the surface of utensils with hot water will give off a bitter smell.

Old methods like this using chemicals, and oxidation.

Use potassium permanganate, a strong oxidizing agent, to oxidize the glaze.

Except that the surface is slightly red, the rest of the features are consistent with those after acid leaching.

Rinse the utensils with water. If potassium permanganate is used too much, the water will turn purple.

Sometimes if you touch some water with your fingers, your fingers will also be dyed purple-brown.

In fact, this is not the biggest flaw. Among the old methods of removing flames, there is another simple method, which is the method of smearing oil.

It is to take the oil stains in the range hood in the kitchen, dip it with a sponge, and apply it on the ceramic surface.

Wipe it off after an hour and repeat the operation several times to make the ceramic glaze matte.

And there is no trace of wear and tear, and the cost of this method is very low.

The matting agent matting method is to add a certain proportion of zinc oxide, zirconia and other matting agents to the configured glaze, so that it can achieve twice the result with half the effort.

Using energy dispersive X-ray fluorescence analysis, as long as the content of certain metal oxides in the glaze of the utensil is found to exceed the normal value, it can be concluded that it is a modern imitation.

There are many ways to make old things. Although Chen Wenzhe knows all of them, he has not used many of them.

For example, the soil burial method is to bury new porcelain in fine mud, take it out after a few days and wipe it off with a dry cloth. After going back and forth several times, you can see that the glaze has a yellowish old color.

High-pressure cooking is to use tea and a little alkali to cook the porcelain for a long time to remove the floating light.

In recent years, some people put the new imitation products into a pressure cooker to cook, which can also achieve the purpose of losing the luster of the glaze.

There are very few water rusts on porcelain after Ming and Qing Dynasties, and the main objects of water rust are ceramics unearthed from this age.

There are several methods, the first is the spreading method.

Dip an appropriate amount of diluted nitro varnish with a brush, and apply a thin layer on the parts that need to be scaled.

If the water rust appears to be sagging, the material liquid can be saturated to form a mark.

Sprinkle talcum powder or other extender pigment powder on top while it is still wet.

After drying, just remove the floating powder.

When doing water rust, you can also add other pigments or sprinkle a little loess, and do it at the same time as the rust.

Although the surface is very similar, you can tell the authenticity by scraping it with a knife.

The second is the double decomposition method. Apply a layer of sodium silicate aqueous solution on the part that needs to be rusted. After the coating is dry, brush the surface of the coating with 5% dilute hydrochloric acid.

When hydrochloric acid meets sodium silicate, a double decomposition reaction will occur to produce white salt substances.

Finally, rinse the following rusty parts with clean water to remove unreacted chemicals and excess salt.

Then there is the soil burial method, in which imitation pottery is buried in loess rich in groundwater.

After being buried for several months, take it out to dry, and repeat it several times to form soil rust.

The effect is especially good if buried in the old site of ancient pottery firing or in ancient tombs.

The disadvantage of this method is that the soil rust is not formed in a short period of time, and it is not tightly combined with the pottery. It will fall off when it is lightly scraped with a fingernail or a knife blade, but this phenomenon will never occur in real soil rust.

In fact, in terms of convenience and quickness, the heating method is the simplest.

This method is to bake the pottery hot, and then mix the soil from the site of ancient pottery or ancient tomb with alum and apply it repeatedly while it is hot.

This goes on and on until the color is the same as unearthed.

This method also has the disadvantage of not being tightly bonded. In addition, if it is washed with alkaline boiling water, the rust will all fall off.

The more troublesome is the mud method, of course, the effect is very good.

This is to put the soil into a special Chinese medicine, boil it for 20 hours, and then apply the obtained mud on the ceramic surface.

The soil rust treated in this way is very similar to the unearthed soil rust, and it is closely combined with the ceramic, even if it is scraped with a sharp blade, it is not easy to fall off.

In addition, there is the cement method.

First, mix ceramic glass glue and soil into a viscous shape, and apply it on the ceramic surface.

The burning newspaper is then heated and swat the ceramic surface.

The rust produced is closely combined with the pottery, and the black paper ash will penetrate deep into the soil, making the traces of time even more apparent.

Because of the existence of glass glue, it will emit the smell of glass glue burning when encountering high temperature.

In the coloring method, shellac paint is first applied twice on the surface of the pottery, then the pottery is soaked with shellac paint and mineral pigments to make a base color, and finally the surface is applied with bletilla striata juice to make soil rust.

Once the pottery made by this method is put into hot water, the traces of forgery can be seen at a glance.

As for the mending device and the splicing device, the joints are rusted and will not condense into one with the original. It is not difficult to see through it after careful identification.

However, if you want to see through, you have to know that there is this old way.

Chen Wenzhe knows many simple old-fashioned methods, and people still use them until now. Why?
Is it because in the market, many people are ignorant?

(End of this chapter)