My system is not decent

Chapter 1448 Seven green, eight yellow, nine five red, yellow, white with gray and half gold

The golden three-legged toad in front of Chen Wenzhe's inkstone dropper is even bigger. It is sixteen centimeters high and nearly thirty centimeters long.

Such a large lump of gold is worth a lot in itself.

If the shape conforms to the style of the Northern Song Dynasty, then if it is a genuine Northern Song gold ware, the price will be even higher.

In fact, Chen Wenzhe is quite new in identifying new and old gold products.

After all, when he opened the shop, he first made gold wares. Although they were all gold bracelets, he really had a high level of experience in appraising gold.

Chen Wenzhe knows how to distinguish the authenticity of the old gold, and the methods for distinguishing the authenticity of the old gold.

To put it simply, the easiest thing is to distinguish the color.

The color of old gold is not as bright as that of new gold, and the surface is engraved with traces of time.

And the old gold is more yellow in color and softer in texture.

Because the old gold has been worn for many years, and it has been preserved for decades or even hundreds of years, a layer of patina is naturally formed on the surface.

In the old days, some gold shops used turmeric powder to add a layer of color to the processed gold jewelry, thereby increasing the color of the gold jewelry.

Therefore, the old gold will look more yellow in color.

This has also led to many people who may not know how to distinguish the real from the fake, and what are the methods to distinguish the true from the fake from the old gold!

Old gold since modern times is generally marked, indicating the purity of the old gold (999 or 999.9) or the words pure gold.

也会标注克拉数，10K、14K，、18K、 22K或24K等。

Old gold has the characteristics of ductility and low hardness. With pins or nails, scratches can be left on the gold.

This is why people like to bite gold with their teeth.

Old gold jewelry with high fineness will make a dull sound of "puff puff puff" when it is thrown on the ground, and it has no elasticity.

Elastic, and the sound is crisp, the fineness is definitely not high.

If you are confident in your technology, you can use a musket to burn old gold.

When the old gold turns red, stop the fire and wait for the natural cooling.

If there is no discoloration and blackening, it means that it is pure gold, and vice versa.

Old gold with high fineness will burn brighter and brighter.

Find an unglazed china dish or, if you don't have one, just pick up a random piece of china at a home improvement store.

Scratch a porcelain plate with a gold utensil. If there are black scratches on the porcelain plate, your gold utensils are not real gold.

If the scratch is gold, it is real gold.

This method will reveal the fake gold, but your gold may be scratched.

In addition to these methods, there are many other ways to look at gold, such as looking at purity.

This also depends on the color. The old jargon is seven green, eight yellow, nine five red, yellow and white with gray and half gold, which describes the purity of old gold.

According to the different luster and color of old gold, you can roughly distinguish pure gold, K gold, real gold and fake gold.

If the color is blue and white, the purity is not high, and if the color is reddish yellow, the purity is high.

Of course, the easiest way is to look at the modern gold mark.

Unfortunately, the markings can also be faked.

Therefore, if you have technology, you still need some real hard technology.

For example, look at the hardness and weight, this is Chen Wenzhe's unique skill.

If it can be destroyed, there are more ways to identify gold.

For example, after bending pure gold jewelry two or three times, fish scale patterns will appear at the bend.

When the pure gold jewelry is bent, it feels hard and the fish scale pattern is not obvious.

Old gold with more impurities will break after being bent two or three times.

If it is made of raw gold, it will break when bent, and the section has obvious sand grains.

If you want to make the identification simpler, if you have the conditions, you can use acid point.

On the touchstone, grind out the identified jewelry and the old gold for comparison, and then test the nitric acid on the gold road with a glass rod.

If it is not gold or pure gold, the golden way will disappear or change.

Low fineness disappears quickly, high fineness disappears slowly, mixed gold disappears quickly, and clear gold disappears slowly.

The last thing is to burn it with fire. This damage is very thorough, so it is generally not used when appraising gold artifacts.

If it is gold recovery, just using the material, you can burn the jewelry to be identified with fire.

Observe the color change after cooling, if the surface still shows the original old gold color, it is pure gold.

If the color darkens or turns black to varying degrees, it is not pure gold. The lower the color, the thicker the color, and all blackening must be fake gold jewelry.

These are common methods used by ordinary gold shop owners.

If it was in ancient times, there were not so many scientific and technological methods, and these technologies were not summarized, so gold could only be identified by experience.

For example, listening to the sound, the old gold with a gold content of more than 99% will make a rattling sound when thrown on a hard ground, with sound but no rhyme and no elasticity.

Fake or low-quality old gold, the sound is crisp and not dull.

Generally, it makes a "dangdang" sound, and there is a lingering sound after landing and the beating is violent, which is obvious.

The final technique is to weigh the weight. Lao Huangjin is small and heavy. Weigh it with your hand to see whether the size is commensurate.

Generally, gold jewelry is weighed in the hand. If it has a slight sense of sinking, it can be perceived as real gold jewelry.

Large and light ornaments may be adulterated. For bulky and light ornaments, you should be alert to the authenticity of the jewelry.

These are all ways to identify the quality of gold utensils. As for authenticity, it is even simpler.

Prepare a tall glass, fill it with water, and you're ready to test.

Throw the metal in and solid gold jewelry will sink to the bottom very quickly.

With imitation gold and other metals, it may float above the bottom, or even float completely on the surface of the water.

Plus, real gold won't rust or tarnish when wet.

The easiest test is to use a magnet. Real gold will never attract a magnet.

The magnet is easy to carry, you can put it in your pocket at will, and it is very convenient to test.

There are quite a few imitations of gold and other alloys that will attract magnets.

So, just approach them with a magnet and see if they will be attracted by the magnet, and you can tell if it is real or not.

People who have worn fake old gold jewelry may have experienced skin discoloration caused by it.

But you can also use the skin to directly try to test its authenticity.

All it takes is holding the metal in your hand for a few minutes, and it's best to do so on a hot day.

After sweat appears on your skin and the sweat reacts to it, observe its changes, and it will never change.

It is that he has a rich enough ability to identify gold, so, almost at a glance, Chen Wenzhe can tell that the three-legged golden toad in front of him is old gold, and it is old enough.

Because he can roughly see the gold content of the three-legged golden toad through its color.

More than ninety-seven percent, this content was absolutely pure gold in the Song Dynasty.

He has seen this kind of gold once or twice, so he is naturally very familiar with it.

So, not to mention anything else, just looking at the purity of the gold of this three-legged golden toad, we can see that it is not simple.

(End of this chapter)