Ancient copper coins, copper on how to remove the cleaning?
Best not to remove the ancient coins on the patina
Amateurs often want to remove the coin collection on the copper patina, but natural patina is to protect the coins. If it is taken away, it will not only damage money, but also affect its market price. There are two coins, although not as good as a good friend, but also worth some money. If you remove the rust, the copper becomes not worth a hair!
Rust is due to casting time, a layer of oxide is formed on the surface of copper coins. The accumulation of the oxides is different because of the different conditions such as geography, geology and time of entry...... This money in body surface by copper tire out of itself is very strong small and massive patina, commonly known as the "natural rust" or "hard rust", with a nail or knife is removed, the distribution of natural decency.
