Today we will talk about how to clean old coins. Every year they gain even more value, but the price greatly depends on the condition. Therefore, an item preserved in proper condition receives additional value. When antique coins are kept in unfavorable conditions, dirt, oxides and deposits of different colors develop. You can use special solutions that are sold in jewelry stores, but not everyone can afford it. Therefore, let's look at how to clean an ancient coin using available methods.
General information about cleaning coins
It is important to understand that not all specimens need serious cleaning; sometimes the procedure can even be harmful. It would also be good to learn to distinguish patina from oxide and plaque, since it gives the metal nobility and protects it from external factors. Every collector knows that a layer of patina is more important than a brilliant shine.
If this is your first time trying to clean old coins at home, it's best to start with the least valuable coins. If they fail, they will not be so sorry. On them, try the method that interests you. When it comes time to work at elevated temperatures, try to ensure that the transition from room temperature to high is smooth. A sudden change can damage the metal.
When you have to use a brush, it is better to use a soft one, such as a toothbrush. Do not use items with metal bristles or sandpaper.
It is important to dry properly, especially antique coins. To do this, you need to place them on a soft cloth and carefully apply it on top several times. It happens that drops of water leave their mark on antiques.
See also video: 3 ways to clean old coins at home
Starting the cleaning process
We choose a cleaning method depending on what type of dirt we are dealing with. There are chemical and mechanical, in the second option we are talking about dirt, dust, earth and other contaminants that are cleaned mechanically without using special means. The first method involves a certain chemical reaction that will help wash the coin from oxide, green plaque or any other.
If you have not previously worked with the methods below, carefully follow the instructions and do not overdo it so as not to damage the product. Moreover, you should not change the recipe or come up with your own.
Cleaning from contaminants
At this stage we are talking about mechanical cleaning. Depending on what kind of metal we are dealing with and how dirty it is, we choose the cleaning method:
- A soap solution can handle minor stains; use it to remove dirt using a brush or an old toothbrush.
- In difficult cases, we act depending on the composition of the coin. You can use the methods given in the paragraphs below.
- If the pattern on the surface is not visible, put it in a soap solution for 10-15 minutes. You can use laundry soap. After this, using a toothbrush, carefully wash the coin directly in the water. Then we dry it.
How to clean a coin found in the ground
Often, when searching for old coins, they are found in the ground; such finds often resemble those from the USSR. Sometimes they lie there for years and the dirt has become so ingrained that it has become almost integral to the product. Cleaning such coins at home will be done by boiling.
You need to make a soda solution, one tablespoon of soda per glass. It is better to place the contaminated item in a sieve or something similar so that it does not lie at the bottom of the pan. Bring the water to a boil and leave to simmer for half an hour. Now turn off the heat source and let the water cool slightly. We take out the product and carefully clean it using a toothbrush or other soft brush. We carry out the procedure as many times as possible until the coin restores its normal appearance.
Cleaning with baking soda
In this case, we will clean coins from oxidation using ordinary soda, which will be used as an alkali. That is, the main task is not mechanical cleaning, but chemical cleaning. We make a regular soda solution and immerse the products there. The concentration of the solution depends on the complexity of the case; as a rule, add 1-2 tablespoons of soda to a glass of water. After a few hours, pull it out; if there is still plaque, remove it with a soft cloth and dry it.
You can make a kind of paste from soda and water. We put coins there for a certain time and periodically watch it so that the soda does not start to dry out right on the surface. After the procedure, remove and use a soft brush to clean all residues from plaque and oxide while simultaneously rinsing in water.
You can make your own cleaning products. To do this, we make a mixture of ammonia, soda and toothpaste. By closing it all in a jar it can be stored for a long time. Cleaning with its help is very simple, apply the mixture and wash with a toothbrush.
Cleaning a coin with soap
The basic method for cleaning an old coin involves using a soapy solution. We rub the soap shavings on a grater and soak them in boiling water so that a mixture somewhat reminiscent of jelly is formed. Place a coin there, cover and leave for 1-2 days. In difficult cases, add soda, 2-5% of the total mass of the solution. When time has passed, remove it. Rinse under running water and dry. Soak in alcohol and leave until completely dry.
Boiling down coins
Heat Vaseline or vegetable oil and immerse a coin in a strainer there for 10 minutes. Wash with running water and soap. Pour clean water into a vessel, immerse our coin in it, heat it to a boil and leave to cool. After the procedure, wipe the product dry.
Jewelry Cleaners
The best option for cleaning an old coin at home is a jewelry cleaner. It can be purchased at jewelry stores and workshops. This could be a napkin or solution. In the first case, you need to wipe the surface of the product. In the second, immerse the coin there for 5 minutes.
It is better to entrust valuable coins to professionals. It would be a shame to ruin an antique due to your own incompetence. The workshop will not only clean it, but also polish it and may apply an additional layer of protection.
Cleaning depending on alloy
The most common coins are:
- Gold;
- Silver;
- Bronze;
- Copper.
Depending on the metal, the cleaning method is determined. More details about each can be found in the relevant articles on our website.
Pure gold
Coins made of gold are surprisingly easy to clean. To do this, you can use one of the methods below:
- Make it in a glass soapy water and add 10 drops of ammonia. Place the product there for 10-15 minutes. Wipe dry.
- To bring back the shine to gold, cheap and effective means there will be onion juice. Using a soft cloth, rub the surface of the metal with it and leave for several hours. Rinse under running water and wipe dry.
- In stores you can buy a special paste for laundering gold.
Laundering silver
Silver coins are durable, so they are much more difficult to damage. It is not recommended to use baking soda with this metal. At first it will cope with its task, but over time micro-scratches may form. So how to clean silver?
- The easiest way is with toothpaste (or powder) and a brush. Apply the product to the surface and scrub until it returns to its normal appearance.
- Making a solution citric acid in a ratio of 1:3. We put our coin collection there and leave it for 10 minutes. Take it out and clean it with a toothbrush.
- Sometimes, to restore shine, simply immersing it in ammonia for 2 minutes is enough.
Cleaning bronze
If there is no damage, oxide or any plaque on the surface, then it is treated mechanically using soap solution. In other cases, we resort to one of the methods below.
- As in the case of silver, we make a solution of citric acid, but this time you will need a 1:2 ratio. Place the product there for 10 minutes, rinse and wipe dry. The color may change slightly, but after a few days everything will return to normal.
- An excellent method for cleaning antique gold coins is to use vegetable oil. With its help you can not only restore the appearance, but also add an additional protective layer. To do this, you need to bring the oil to a boil and gently lower the coin there for 5 minutes. Remove and immerse in ethyl alcohol for the same amount of time. Rinse and dry.
Processing copper coins
On copper coins, not only oxide is possible, but also yellow, white, red and green patina.
- If the coin is covered with a red layer, a solution of ammonium carbonate or 5% ammonia will help. Immerse the item in the solution for 5-10 minutes, wipe well and dry.
- The above-mentioned citric acid in a ratio of 1:10 will help with green.
- Ordinary will help against yellow plaque table vinegar. Dip a coin into it for 5-10 minutes, wipe and wipe dry.
- The easiest way to wash off the white coating is to just take distilled water and immerse dirty copper coins in it for several days. Pull out and wipe soft cloth.
- In particularly problematic cases, use Trilon-B.
Another way to clean copper coins in the video:
Coins are witnesses of history. Time leaves its mark on them, and the older the coin, the more distinct it is. The metal ages, becomes covered with oxides, and the value of the coin decreases. Coins do not always reach the collector in good condition; they require care, including cleaning. The article will tell you how to properly clean coins at home.
The best ways to clean coins yourself
There are many different ways, but chemical and mechanical are the most common. Each of them is good in different cases, based on the condition of the coin and the nature of the contamination.
Mechanical method
Usually used in particularly advanced cases. In this case, the coin is literally cut out or reduced in a layer of oxides.
A simplified process looks like this:
The surface layer of dirt deposits is removed from the coin, after which it is desalted in a container with distilled water.
A layer of surface oxides (including loose ones) is impregnated with synthetic resin (B72).
Using scrapers, cutters, brushes and needles of varying hardness, all excess is removed from the surface. The resin strengthens loose areas, binds them and prevents cavities from forming, which allows the surface to be leveled.
The work is performed under magnification (for example, a microscope). A successful result directly depends on a scrupulous attitude and experience, so it is better to entrust work with expensive items to a professional.
Chemical method
It involves cleaning coins with various chemical compounds, depending on the metal from which they are made, as well as the type and degree of contamination.
In order not to spoil the coin and choose the correct composition, you need to know exactly what metal it is made of. There are special chemical compositions, but their cost is quite high.
Instructions for cleaning old coins
Grind neutral soap (for example, baby soap), add water to obtain a plastic mass. Place the coin there, periodically removing it and rinsing it under running water, rubbing it with a soft cloth. This is the gentlest and safest method of cleaning; its disadvantage is the length of the process. Complete cleaning may take 1-2 weeks.
The second gentle cleaning method: boil coins in Vaseline oil until completely clean and wipe with alcohol. Caustic soda can be used as a cleaning agent. You need to work with it with tweezers very carefully, wearing rubber or latex gloves, avoiding contact with the skin and eyes.
Coins are placed in caustic soda dissolved in COLD water, and after 10 minutes they are rinsed in running water and wiped with a soft cloth. If the coin begins to show bluish streaks, stop processing immediately and rinse it.
Copper
Metal is very capricious. Green plaque can be removed with citric acid, half a teaspoon of which is diluted in a glass of boiling water. Leave the coins in the resulting solution for no more than ten minutes, then rinse and wipe.
Do not be alarmed if the coin has acquired a reddish tint - it will disappear over time. Another way is to use 200 ml. water and 30 ml of hydrogen peroxide. Soak the coins in the liquid for 15 minutes and wipe with a soft cloth.
Bronze
You should not use acids; ammonia works very well. It perfectly removes oxides and does not harm the metal at all. After processing, rinse the coin and wipe dry.
Silver
Darkened coins can be easily cleaned with ammonia diluted in water (1 part alcohol to 9 parts water). Immerse the coins in the mixture for 40-60 minutes, and then rinse with water and wipe.
Ammonia can be replaced with table soda (1 tablespoon per 100 ml of water). Place the coins in the heated liquid for 4 hours. If this does not help, use formic acid heated to 70 degrees.
Iron
Coca-Cola can be used to remove rust and oxidation from coins. Pour the drink into a glass or ceramic container and keep the coins in it, turning over for an even result.
Zinc
It is very difficult to restore with household compounds. After their exposure it darkens. Some people use hydrochloric acid, very briefly. In a few minutes the coin can be completely dissolved.
When working with zinc, it is advisable to use a special composition “Leuchtturm”, which does not contain aggressive substances. The coin is processed for 15 minutes, after which it is washed and wiped dry.
Gold
It is remarkably cleaned in an aqueous solution of soda (2 teaspoons per glass of boiling water). The coins are dipped into the solution brought to a boil and the temperature is maintained for 30 minutes. The procedure is repeated until complete cleaning.
Bimetal
To add shine to a coin consisting of two different metals, a two-step cleaning method is suitable: place the coins in 9% vinegar for no more than two minutes; Rub the coin with bleaching paste and wipe. If necessary, the procedure is repeated.
Electrochemical method
Principle this method familiar to us from the school physics course. To clean using the electrolysis method, you will need a plastic or glass vessel, wires, a DC source with a voltage of 6-12 volts (a charger from mobile phone), alligator clips and a piece of metal (non-ferrous metals will not work).
A pre-prepared electrolyte (1 tablespoon of salt per liter of water) is poured into the vessel, into which the clamps are lowered. A coin is secured in a clamp connected to the negative terminal of the power source. Use a positive clamp to clamp a piece of metal.
The clamps are energized and cleaning takes a little time. The process is characterized by turbidity of the electrolyte. Once cleaning is complete, the coin is washed in hot water and dried.
Do not forget that cleaning coins with aggressive substances can give a beautiful appearance, but irreversibly damage the collectible value. Therefore, this issue must be approached very carefully. For example, it’s worth trying out a method on inexpensive coins.
If the result is positive, you can safely move on to working with an expensive copy, provided that it is made of similar material.
Coins must be stored in conditions that exclude mechanical damage, as well as moisture and ultraviolet rays. If the coin has been touched with bare hands, it should be washed with soap and wiped dry, and then placed back in the cell.
Photo of cleaning coins
Any novice treasure hunter is interested in the topic of cleaning found items, including coins. First, you need to understand that the main cleaning methods that will be effective in your case depend on the alloy of the sample you find.
Silver, nickel, copper gold and other alloy coins are cleaned differently. In this article you will learn how to clean copper coins. According to statistics, finds made from this metal are the most common and, after discovery, definitely need to be cleaned. Professionals will help you properly clean the find, since this is a rather delicate matter and the process itself can be quite complicated; it is especially difficult to preserve the patina layer or if you have one of the representatives of the royal coins. But not every treasure hunter is ready to pay the cost of the procedure or put the found coin at risk, which is why we have presented you with the most effective options for cleaning copper coins yourself at home. You will find various ways from frankly simple cleaning with soap to semi-professional Trilon.
Coin conservation
The first thing a novice treasure hunter needs to know is that it’s not enough to just throw your copper find into a bag and start processing after a while. It is very important not to damage the patina; the patina layer is a coating formed over years of burial underground, which can protect the product from severe damage and maintain its original value.
You should handle the find with plastic tweezers, and store it in a non-metallic container, preferably also plastic. You can avoid exposure of a coin to external irritants by preserving it. There are two most popular types of preservation:
1) Fill the container with cotton wool. A temporary measure, sufficient for transportation, but not for long-term storage.
2) Fill the container with olive oil. Ideal for both transportation and long-term storage.
Cleaning Copper Coins
Anyone who has ever experienced cleaning copper medallions on their own will say that it’s easy to ruin such a product.
Strong mechanical, chemical or acidic effects will lead to inevitable damage to the patina, and in cases where the specimen is very rare, it is worth considering the help of professionals.
For everyone else, there are several options for the safest cleaning.
Method 1: soap solution
Soap is the most gentle option, the essence of this process is very simple: choose soap without unnecessary impurities (household soap is best), rub it on a fine grater. We dilute it with boiling water to a homogeneous thick mass and place all copper finds in a non-metallic container, preferably plastic. From time to time it is worth removing coins from the soap and rinsing them under running water using the softest toothbrush.
This method has its disadvantages:
— if you overdo it with a brush, you can damage the coin;
— the whole process can last from 1-2 weeks to several months.
Method 2: citric acid
Various low concentration oxides will help in short time To clean the product, citric acid, which is present in almost any kitchen, is ideal for these purposes. The acid crystals must be diluted until completely dissolved in a non-metallic container and a copper coin must be placed in the solution. The cleaning process will begin instantly, but along with this all the unpleasant chips, abrasions and other minor damage will appear.
Method 3: oil cooking
Cleaning coins in this way is suitable for those who are not afraid of getting burned, because the whole point of cleaning is that the coins are placed in a pan with oil (olive or sunflower) and then begin to boil. The danger is that one by one the coins should be removed from the container and given a slight mechanical impact with a soft toothbrush. If you don’t overdo it with the brush, you can quickly get rid of dirt without harming your coins using this product.
Method 4: cooking in soda
Another way to “cook” a copper medallion to perfection is to boil it in water with 3-5 tablespoons of vinegar per half liter of volume. The final result is quite good, a small green coating disappears from the surface, and difficult areas can be finished with a brush using dry soda.
Method 5: ammonia
If during the cleaning process one of the previous methods failed to achieve the desired result or there is initially a large layer of plaque on the product, then you can use ammonia. The coins are completely covered and remain in the bath until completely cleaned. Definitely, this method is very effective, but one of the most harsh on the surface, you can almost forget about the patina layer.
Method 6: cleaning with Trilon-B
Trilon-B (disodium salt of ethylenediaminetetraacetic acid) is a specially developed product whose action is aimed at softening metal salts. Oxides and patina under trilon are very easily removed from the surface. Trilon-B ideally copes with uniform contamination, but in the case where the coating is located pointwise on the product, the part that was contaminated will acquire shine, and other surfaces will lose a layer of patina. By choosing to clean with Trilon, you can get a clean coin in a few minutes, without damaging the metal, as some salts and alkalis do.
Method 7: electrolytic cleaning.
If you are familiar with various chemical cleaning methods, then you can resort to this product. For this you will need:
- A glass of cold water;
- Stainless steel spoon;
- Salt (small pinch);
- DC source 9-18 volts;
- Small crocodile clips;
- Soda.
The first thing to start with is to prepare a saline solution, a copper medallion is lowered into it, to which a negative wire is pre-attached, the positive wire is attached to a spoon and is also lowered into the water. Make sure that the coin and spoon do not touch in the solution. After proper placement, you can plug in the adapter; after a while, the solution will begin to become cloudy, turning the color of the impurities that have come off the surface of the product.
Important
You can check whether the coin has been cleaned or not by first disconnecting everything from the voltage; if the product has gotten rid of plaque, you can stop it by disconnecting the coin from the clamp and placing it in soda for a while to stop the reactions taking place. This method is somewhat universal and will also work for other coins.
You can clean your find using any of the methods presented above, each of them has been tested and each has its own pros and cons; which one is better, simple cleaning with lemon or hard cleaning with Trilon, is up to you. Do not forget that all the nuances can be learned only during the cleaning procedure at home, and if your coin is an exceptional rarity, for example, one of the royal coins, then you should seek the help of professionals and not risk a valuable specimen. Remember, these methods are only suitable for cleaning a copper coin; if you have one of the nickel coins or another metal, these methods will not work. After cleaning, take care of proper storage, and then the find will delight you for many years.
Many people are interested in collecting coins. And at the same time, it doesn’t matter what coins they are. Some people collect the most ordinary modern money, while others hunt only for the rarest collectible options. But in both cases, you want to preserve the chased lines and gloss so that the collection can please the eye for a long time.
About coin cleaning methods
There are several methods for cleaning collectible items.
Before you start cleaning a contaminated coin, you need to find out whether it can be cleaned at all. The fact is that some collectible coins have a special Proof coating.
And this layer is under the influence chemical substances may leave. Such coins can only be washed in distilled water. If there is no Proof coating on the coin, then it can be cleaned.
But you just need to clean it carefully and try not to damage it. Professionals in this field often use compounds that include caustic soda, ammonium carbonate and other chemicals. However, not everyone will be able to do such work, and these substances are usually not at hand.
Cleaning a coin with toothpaste
Therefore, people who are not professionals in collecting coins can be advised to use for cleaning toothpaste, ammonia and soda. There shouldn't be any problems finding these substances.
All this needs to be mixed, poured into a small container and closed tightly. When the need for cleaning arises, a small amount of this mixture should be applied to the surface of the coin, rubbed thoroughly with a soft brush, then rinsed with clean water and then wiped dry.
Cleaning a Coin with Baking Soda
You can use another method available to everyone: soda is mixed with water, and a contaminated coin is placed in this solution. The more contaminated it is, the longer you will need to wait before removing it from the solution. Having waited and taken out the specimen, all that remains is to wipe it with a sponge, rinse it in water and dry it.
Cleaning a coin at home with acetic acid
You can also use acetic acid instead of soda.
- The solution should be 5 percent.
- The coin should be kept in it for 3-4 hours
- Remove and be sure to wipe with a clean cloth.
- If the surface is not completely clean, you can repeat after 48-72 hours, and with less time in water. This is especially important if the coin is very old.
Cleaning coins with citric acid
Another option is to use citric acid. But here you need to be careful, as the coin may deteriorate. It only needs to be dipped into the solution for 5-10 seconds, then rinsed again with running water and wiped dry. To prepare the solution you will need half a teaspoon of acid and a glass of boiling water.
The methods described above are simple but effective, and they will definitely help a novice collector clean coins.
It is difficult to find a numismatist who has never encountered a problem associated with the appearance of oxides and rust on collectible items. Therefore, every collector asks the question of how and what to clean coins at home. In fact, caring for coins requires compliance with a number of rules, especially when it comes to cleaning antique coins that have high historical value.
Cleaning coins with soapy water
Rules
- Before choosing a coin cleaner, you should pay attention to the alloy from which the coin is made, because each metal can react differently to the same substance included in the cleaning product. Still, there are means that can ruin any coin. For example, a powder with abrasive particles that leave scratches on its surface can be detrimental to the condition of the metal.
- It is not recommended to clean copper coins at home with concentrated acids, for example, hydrochloric or sulfuric acid.
- If the coin has a proof treatment, then it cannot be cleaned with any means. It is enough to regularly wipe the specimen with microfiber.
- Before cleaning old coins, you should pay attention to the characteristics of their patina. If the layer of plaque is uniform, and the images on the coin are clearly visualized, then it is not worth cleaning such a specimen, since removing the patina may result in the loss of the noble appearance of the coin and a decrease in its value.
- Before using any cleaning product, you should test it on less valuable collectibles. An unsuccessful cleaning experiment can result in the value of expensive items being neutralized.
Cupro-Nickel Coins: Cleaning
The coins, consisting of an alloy of nickel and copper, were produced from 1931 to 1935 under the USSR. On such specimens, brown-red oxides appear, which are quite difficult to remove. So how do you clean nickel and copper coins?
1) Electrolysis method: its essence is to supply electric current to an electrolyte, which is a salty aqueous solution. Important: by choosing this method of caring for coins, you should ensure protection from electric shock, as well as protection from electrolyte getting on the mucous membranes! To clean coins by electrolysis, you should prepare a power supply with a voltage of up to 18 volts (this can be a power adapter from an old phone). Its plugs must be cut off, the wires divided into 2 parts, and the insulation removed from the ends of the wires. The copper wires are twisted and soldered to metal alligator clips. After preparing the adapter, you can begin preparing the electrolyte: take 1 teaspoon of salt and dissolve it in a glass of cold water (the finished liquid is poured into a plastic tray).
Cleaning a coin by electrolysis
After the work has been done, it is necessary to determine which wire will be the cathode and which the anode. To do this, a simple test is carried out: a metal spoon is immersed in a bowl with a solution and one clamp is attached to it, and the other is connected to a coin. Before starting the adapter, you should check that the coin and spoon are not in contact, otherwise the adapter may break. If there is a hissing sound near the spoon after turning on the equipment, then the clamps must be swapped.
The wire with the “-” sign is connected to the coin, the positive wire is connected to the metal spoon. The coin is left in the bath until it is completely cleansed. An electric current passed through the metal will push out rust and dirt.
2) “Trilon-B”: this product is widely used for cleaning coins made of nickel and copper alloy, so you can use it to clean an old coin. A solution is prepared from Trilon-B, consisting of 1 part of the product and ten parts of water. Then a coin is immersed in such a solution and its cleaning is monitored. Finish cleaning by rinsing the coin in clean water and drying it.
3) You can clean a coin in an unusual way: take tobacco ash and water, and then prepare a thick paste from these two components, which is applied to the coin. After 20 minutes, the ashes are rubbed into the coin, after which it is washed off with water, and the coin is dried.
Copper-nickel alloy coins can be damaged by the following:
- Vinegar: This product is often used to clean coins, but can be destructive on copper and nickel coins. Acetic acid gives coins an uncharacteristic pink color. Additionally, the coinage becomes unclear, causing the value of the coin to decrease.
- It is known that patina can be effectively removed from metal with hydrochloric acid. Its household analogue is a product for cleaning plumbing fixtures from corrosion deposits - “Toilet duckling”, because the product contains hydrochloric acid. But it is not suitable for cleaning nickel and copper coins, since hydrochloric acid can turn a valuable piece into a shiny metallic disc without any images.
- You cannot clean coins from the USSR period with GOI paste, as this product contains abrasives that can destroy the images on the coin and make it unnaturally shiny.
How to clean old copper coins?
How and how to clean copper coins:
- Soap: if copper coins have minor contamination, it is enough to limit yourself to using a soap solution. You need to immerse coins in it for several hours, then take them out, rinse them in water and dry them. If your collectibles require more thorough cleaning, you can make a paste of baby soap. To do this, finely grate a bar of soap and combine it with water to form a thick paste, which should then completely cover the coins. The pulp is left on the coins for 2-3 days, after which it is washed off.
- Vinegar: This product is allowed to be used for pure copper coins. It is enough to fill the coins with a bite and constantly monitor the degree of their cleaning. It is important not to overexpose the specimens in vinegar, otherwise the metal may deteriorate. To clean coins, you can also prepare a “vinegar dough” consisting of wheat flour and vinegar, taken in equal parts. They cover the coins with the “dough”, wait for it to dry, and then clean everything off with a soft brush.
- Ammonia: it is used in extreme cases at the numismatist’s own risk, when the coin is thickly covered with oxides that cover the images. You just need to put the coin in ammonia and take it out every 20 minutes to clean it with a toothbrush. The procedure is performed until the desired effect is achieved.
- Homemade cleaning product: consists of one gram of oxalic acid, five milliliters of ethyl, four milliliters of turpentine and a milliliter of water. All ingredients are mixed, mixed thoroughly, and then the resulting product is applied to cotton wool. The coin is carefully wiped with it, and then wiped dry with microfiber.
- Calgon: This product effectively dissolves rust deposits. Calgon is combined with water in a ratio of 1:5, then the solution is brought to a temperature of 60 degrees. Coins are dipped into the resulting solution and wait until the rust separates from them.
- Olive oil: this cleaning of coins at home lasts several months, but at the same time olive oil absolutely safe for copper. All you have to do is take olive oil, pour it into a plate and completely immerse the coins in it. After 60 days, the specimens need to be removed and cleaned with a soft brush. Afterwards, you need to refresh the oil and put the coins in them again. Actions are carried out until the final disappearance of contaminants.
- Vaseline: This oil can be used to clean copper coins of insignificant value. Fill a small saucepan with Vaseline oil, place coins in it, cover everything with a lid and place the vessel on very low heat. After the oil boils, turn off the heat, and after another 10 minutes, remove the specimens and gently brush them with a brush.
Ammonia
Copper coins can also be cleaned with Trilon-B and by electrolysis.
A universal way to clean coins from dirt and oxides is to use ultrasound. For this purpose, an ultrasonic bath is purchased - portable equipment that affects the products being cleaned using ultrasound. Thanks to this equipment, you can clean not only coins, but also jewelry. The ultrasonic bath is battery operated. How to clean the coins in it:
- Place a coin in the removable container of the bath.
- Pour water so that it completely covers the specimen.
- The bath is turned on and the process of cleaning the coin is observed.
If the coin is expensive and valuable, then it is recommended to entrust its cleaning to an expert who probably knows how to properly care for valuable specimens.
