- How to clean a copper coin from a white coating?
- Than clear greenery and blackness from a copper coin?
- The most effective cleaning methods
- Dangerous cleaning methods
- Cleaning of coins from precious metals
For sure, everyone in the house or in the apartment has at least one copper coin, which was coated with oxides long ago. As soon as you remember about it and want to take it in hand, you will be scared to do it, because it looks awful. If you do not intend to throw this thing out, you need to learn how to clean the copper coin, and do it as far as possible. Different ways of cleaning copper coins you will find in this article and for sure you can choose a more convenient option for you.
to the contents ↑How to clean a copper coin from a white coating?
The white color of the coin indicates that there are impurities of the zinc ligature in the alloy. In this case, the most gentle cleaning method is cleaning with distilled water.
To do this, just put your coin into this water for a few days.
Important! Perhaps it will happen that the copper will go green flakes. If this happens, they can be removed with a toothpick or a toothbrush with a soft brush.
to the contents ↑How to clear greenery and black from a copper coin?
Wipe with a cotton swab, which first moisten your coins in ammonia, and then rinse in soapy water.
Important! Ammonia reacts with copper compounds, which give the same green or black coating. As a result, a water-soluble complex is formed, which is easily washed off. Using this tool, you can easily clean the copper coin at home.
to content ↑The most effective cleaning methods
In addition to the above methods, there are other tools that will help you clean the copper coin at home.
Soda solution
Fast, high-quality, and most importantly - a simple cleaning option: digestion of coppers in a solution of soda:
- In a liter of water, dissolve 3-5 st.l.soda.
- Cook your coins in this solution for 30 minutes.
- Wash with running water and dry.
Important! Oxides that are green must necessarily go away, and the patina layer does not collapse in any way. But be careful, because cavities can open, as well as irregularities.
Trinol B
Very good effect gives the cleaning of copper coins in a specialized tool "Trilon B".
Important! This means dissolves a large number of insoluble metal salts, and this is why all the oxides, and also the patina, leave the surface of the copper coins.
"Trinol B" does not destroy the metal and provides a very high cleaning speed:
- . In the event that the coin has uniform oxide layers, it is cleaned to its original gloss.
- If the structure of the oxides is uneven, then these layers may remain, and this procedure will need to be repeated.
Important! After such cleaning of the copper coin, it is necessary to carry out artificial patination.
Mechanical cleaning
The most clever is the mechanical cleaning of copper coins, because it requires a grand experience, as well as the work of a master. The original appearance of the coin is restored by removing excess layer from the surface with the help of special tools.
Important! The procedure is conducted by real professionals under a microscope. No flaws and caverns will remain, the results are simply amazing. But such a cleaning of copper coins will not be expensive, so it makes sense to order it for those specimens that represent real monetary value or personally for you are of great importance.
to the contents ↑Hazardous cleaning methods
In addition to the universal and safe above methods, you can use more aggressive measures if cleaning copper coins did not give the expected result, and you do not want to carry your products to professionals. Each of the methods suggested below is relatively aggressive, so weigh all the pros and cons before proceeding.
Acid
You need to think carefully about whether you need to clean coins at home at all. Often an uncleaned copper coin is valued much more expensive. It may happen that this cleaning will reveal all the shortcomings of the product, which are hidden under a small layer of patina and oxides, or it will destroy it in general.
The method of removing plaque, where a variety of acids are used, can greatly damage your coin. Yes, absolutely any acid quickly removes the green coating, and at the same time completely caverns, fractures, and also unevenness are bare.
Electrolysis
It is quite unsafe to clean copper coins by electrolysis, because the work is related to the use of electricity. If the coin is not strewn with heavy damage and obvious caverns, then this method will be incredibly effective. Otherwise - to completely deny all defects, and with it, the coin will lose its value.
Important! To use this method it is necessary:
- Take the power supply to 12 V.
- Connect it to 2 wires.
- Collect a container with a little salted water.
- Dip a coin into it and attach the wiring to the product.
As a result of the supply of a small electric current, patina, mud, oxides will be removed.
Digestion in oil
A dangerous method is the digestion of coins in oil. When using this method, you must be careful, be sure to follow your safety techniques:
- Always use special protective clothing, glasses.
- The container must be open, because oil vapors may explode unexpectedly.
Important! Use at the same time a vegetable or medical Vaseline oil. The boiling point of the oil is more than 300 degrees Celsius, copper carbonates completely dissolve in them.
to the table of contents ↑Cleaning precious metal coins
If you are lucky and you are the lucky owner of rare gold or silver coins, we are sure you will be very interested to learn how to clean old coins at home without using the help of professionalrestorers.
Important! It should be noted in advance that the silver and gold specimens of your excellent collection require a more careful and careful attitude to themselves than copper coins. On copies made from precious metals, oxides are practically not formed, so there is no need to use bristles with stiff bristles to clean them. If you act in this way, a small amount of scratches may appear on the metal.
The first method of
This procedure is excellent for removing contaminants from absolutely any silver coins, even if they are very old. In order to clean the product you need, you need 10% ammonia solution:
- In this ammonia solution, place your coin for about 1 hour.
- Remove and rinse in warm running water.
- Dry thoroughly.
Important! This method will help you eliminate even the strongest oxides.
The second way
Coins from silver can be cleaned with a 9% solution of ordinary table vinegar. Immerse the specimens in the solution for about 3 hours, and then rinse in warm running water with soap, dry it and take your jewelry back to the collection.
The third way to
In order to clean your precious gold specimens, it is necessary:
- To begin, rinse them with acetone.
- Then immerse in solution with citric acid for about 3-4 hours.
- Finally, rinse with distilled water and dry your coin with a paper towel.
Important! Precious coins are in demand in special storage. This means that they must be stored separately from each other. It will be appropriate to purchase a quality album.
Now you know about all the methods that you can apply to clean the copper coin. We hope, they will help you to keep your unsurpassed and precious collection properly, as it should.
