How to distinguish the authenticity of ancient copper coins?

1, look at the ancient copper coins and determine the authenticity.

Ancient copper coins were made of bronze, white copper, red copper and brass. Before Jiajing in Ming Dynasty, coins were generally made of bronze, with a small amount of white copper and more red copper coins in Liao Dynasty. Bronze is easy to fracture, and the fracture surface has no copper color. After the fracture is rubbed on the stone, the copper color changes obviously. Brass coinage and bronze carving mother money began in Jiajing of Ming Dynasty. The discovery of copper coins or bronze engraved mother money before Jiajing in Ming Dynasty can be judged as post-casting.

2. Listen to the sound of ancient copper coins and judge the authenticity.

The longer the age of ancient copper coins, the more serious calcification. Calcified copper coins lost their original sound, and the sound of metal impact was dull. The quieter the sound, the longer the time. Anyone who finds an ancient copper coin has a high voice, which means there is no calcification and can be judged as a new imitation.

3. Smell the ancient copper coins and judge the authenticity.

The longer the time of ancient copper coins, the more serious the oxidation, and the longer the oxidation time of copper coins, the smaller the copper odor. All ancient coins with heavy copper smell can be judged as counterfeit money.

Extended data

Preservation method of copper coins

1. Valuable coins should be packaged separately. Gold and silver coins are soft in texture and will be damaged when rubbed against each other. The most prominent part of the relief is also the most easily scratched part, so it is best to use a single package for gold and silver coins. Precious ancient money should certainly be like this. Pay attention to ventilation when packing.

Second, precious metal coins will be bruised when they fall to the ground or touch hard objects. Most of the ancient coins are rusted, and they will break when they fall to the ground. Excessive force can also cause fracture and breakage, so be especially careful about this ancient money with serious corrosion.

Third, the surface of ancient coins will generally form protective rust. This kind of protective rust is also called old rust. Rust is hard, green, blue and red. It can protect itself, and it's better not to destroy it.

Four, gold and silver coins for a long time, often dim and affect the viewing, you can add a small amount of toothpaste, gently scrub, try not to use a brush.

Harmful rust produces money, which will soon rot and be contagious. Harmful rust is powdery, and coins with harmful rust should be isolated immediately.

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