Skip to Content

How do you clean old coins without losing value?

Cleaning old coins is a process that should be approached with great caution to ensure that the value of the coin is not reduced during the process. There are several precautions that you should take, depending on the coin’s age, condition, and other unique factors. Here are some steps that can help you clean old coins without losing value.

First, it’s important to understand the potential risks of cleaning old coins. Many collectors believe that cleaning can remove authentic patina, which is a layer of coloring and texture that forms over time. This patina can be crucial for determining the coin’s origin, authenticity, and condition.

Therefore, you should only clean a coin if it has a layer of dirt or grime that obscures important details.

The first step in cleaning old coins is to use mild soap and water. You can mix a solution of warm water and a mild, unscented soap, and use a soft-bristled brush or cloth to gently scrub the coin. Make sure to rinse the coin thoroughly with clean, warm water and then dry it completely using a gentle flame, a soft cloth, or simply letting it dry naturally.

If the coin has stubborn stains or grime, you can use a more aggressive cleaning method, but only if you are certain that the coin can handle it. For example, you can use a mixture of baking soda and water or white vinegar and water to create a paste, and then gently massage the coin with a cloth or soft-bristled brush.

However, you should avoid using abrasive or harsh chemicals, as they can damage the coin’s surface and lead to a reduction in value.

Another option you can use is to soak the coin in olive oil or acetone. These substances can help dissolve dirt and grime without damaging the coin’s surface. However, you should only do this if you have experience and you are certain that the coin can handle the process.

Keep in mind that cleaning old coins can be risky and should only be done if absolutely necessary. It’s important to consult with a professional coin dealer or numismatist before you attempt to clean any coins, especially if they are rare or valuable. An expert can provide you with guidance and tips on how to clean the coin without reducing its value.

Cleaning old coins without losing value is a delicate process that requires a great deal of care and attention to detail. If you follow the steps above and seek expert advice, you can safely and effectively clean your coins while preserving their authenticity and value.

Does cleaning coins hurt value?

Cleaning coins can potentially hurt their value, especially if not done properly. Collectors and coin experts generally discourage cleaning coins as it can damage the surface and potentially lower the coin’s grade, which affects its value. Cleaning coins can cause scratches, abrasions, or damage to the original luster, which may reduce the coin’s appeal to collectors.

Additionally, the equipment and cleaning agents used during the cleaning process can also harm the coin’s finish and cause discoloration.

The value of a coin is based on its rarity, age, condition, and historical significance, among other factors. Cleaning coins can potentially alter the original surface and remove any natural patina or discoloration that contributes to its overall aesthetic appeal. Furthermore, collectors generally prefer to retain the “originality” of a coin, meaning the coin’s natural appearance as it was when minted.

Therefore, it is important to exercise caution when cleaning coins. If you must clean them, it is advisable to use non-abrasive methods that do not involve harsh chemicals or abrasive tools. Instead, use a soft-bristled brush or cloth, gently wiping the surface to remove any dirt, debris, or grime.

Additionally, it is essential to know the value of the coin before attempting to clean it. In general, it is better to leave coins in their original state and preserve them rather than trying to enhance their appearance artificially.

Cleaning coins can potentially harm their value, and it is essential to exercise caution before attempting to do so. Collectors prefer coins in their original state, and any alterations or damage caused during the cleaning process can significantly affect the coin’s value for collectors and investors.

Therefore, it is always best to consult with a coin expert before cleaning coins or attempting any restorative measures.

Should you clean coins for collecting?

The answer to the question of whether you should clean coins for collecting is somewhat complex and depends on several factors. While cleaning coins can sometimes make them appear more visually appealing, there are also several risks associated with cleaning that could potentially damage the coin and reduce its value.

One of the primary reasons that cleaning coins can be detrimental is that it can lead to the removal of a layer of the coin’s original surface. This can be problematic because coin collectors often value coins that have retained their original surfaces, as this can inform them about the coin’s history and provide important context.

By removing this surface layer, the coin’s overall value can be significantly reduced.

Another issue with cleaning coins is that it can be difficult to do it properly without causing damage. If a collector attempts to clean a coin using an abrasive cleaner or scrubber, they run the risk of scratching the coin’s surface and causing permanent damage. Even using a more gentle cleaning solution could potentially result in damage if not done carefully.

Despite these potential risks, there are still some situations in which cleaning coins may be appropriate. For example, a coin that has been heavily tarnished or corroded may benefit from some gentle cleaning to restore its appearance. Similarly, if a coin has been stored in a dirty or dusty environment for years, it may be necessary to clean it thoroughly in order to remove any buildup of debris.

Whether or not to clean coins for collecting depends on the collector’s individual preferences and goals. If a collector is primarily interested in maintaining the value of their coins over the long term, they may choose to avoid cleaning them altogether. However, if a collector is more interested in the visual aspect of their coins and wants to display them in a way that is aesthetically appealing, then some careful cleaning may be appropriate.

Whatever the decision, it is important to approach cleaning with caution and to carefully consider the potential risks and benefits.

Why you shouldn’t clean coins?

Cleaning coins is a highly controversial topic in the world of numismatics. While individuals may have different opinions, there are several reasons why you shouldn’t clean coins.

Firstly, cleaning coins can significantly devalue them. This is because cleaning the coin can damage its surface, leading to scratches, nicks, and discoloration. The surface of coins can be delicate and susceptible to damage, and even the slightest scratch can reduce the coin’s overall value. Collectors and investors often look for coins in their original condition, which means that cleaning them could potentially decrease their value considerably.

Secondly, cleaning coins will destroy its natural patina and toning. Patina is a thin layer that forms on the surface of a coin over time due to environmental exposure. This layer gives the coin a unique finish, which is highly sought after by collectors. If you clean the patina from a coin, you remove the natural oxidation that happened over time, and the coin loses its natural beauty, color, and luster.

Thirdly, cleaning coins can damage the overall appearance of the coin, resulting in the loss of the coin’s details. Many coins have intricate designs, which can be damaged by harsh cleaning chemicals or abrasive tools. Once the details of the coin are lost, it becomes less attractive and less valuable.

Lastly, cleaning coins can alter its authenticity. Experienced collectors can spot a cleaned coin a mile away; they will know that the coin has been treated, and not in a good way. This could prevent a buyer from purchasing the coin or discourage them from bidding on it. Coin dealers and coin grading services are also very particular about the authenticity of coins, and they are likely to reject coins that have been cleaned.

Cleaning coins is not recommended as it can significantly devalue the coin, destroy its natural patina and toning, damage the overall appearance of the coin, and alter its authenticity. It is always better to leave the coins as they are and enjoy their beautiful and unique patina. Suppose you are looking to invest in coins for their long-term value.

In that case, it is important to protect them by storing them properly, preventing environmental damage, and avoiding touching them with bare hands that could further deteriorate the surface.

How do you tell if a coin has been cleaned?

Determining whether a coin has been cleaned or not requires keen observation and attention to detail. As a general rule, cleaning a coin is considered a harmful practice as it damages the surface and alters the coin’s original appearance, resulting in reduced value. Below are some signs that may indicate that a coin has been cleaned.

Firstly, inspect the surface of the coin. A cleaned coin often appears glossy or shiny with an unnatural luster. The coins’ original surfaces should have a natural patina or toning that results from years of circulation and exposure to the environment. A coin with a glossy appearance may have been polished, rubbed or treated with acidic chemicals to remove dirt and impurities.

Another sign that a coin has been cleaned is the presence of scratches or hairline marks. Cleaning a coin with abrasive materials, such as brushes, erasers or toothpaste, can leave behind scratches or hairline marks that can be visible under magnification. Additionally, abrasive cleaning can remove some of the coin’s finer details or cause tiny pits and nicks on the surface.

The edges or rim of a coin may also show signs of cleaning. Cleaning can cause the edges to have a dull or flat appearance as opposed to the sharper and raised edges of an uncleaned coin. Furthermore, the cleaning process could result in changes in the edges, such as the reduction or disappearance of the reeded edges on some coins.

Finally, the use of chemicals to clean a coin can leave behind traces of cleaning solutions. Some cleaners, such as tarnish removers or acids, might cause the coin’s surface to deteriorate over time, resulting in pitting, stains or discoloration. If a cleaned coin has residual traces of the cleaning solution, it can cause chemical damage if left unattended.

Determining if a coin has been cleaned or not is a critical aspect of coin collecting. Careful observation of the coin’s surface, edges, detailed features and the use of magnification can help identify signs of cleaning. Coins with natural toning, sharp edges and clear surfaces are prized specimens that collectors seek to add to their collections.

Similarly, knowledgeable collectors can easily identify coins that have been cleaned, resulting in a lower resale value.

How much does cleaning devalue a coin?

Cleaning a coin can potentially devalue it significantly, depending on the method and level of cleaning. In general, collectors prefer coins in their original state, as any attempt to clean or alter the coin can damage or alter its surface and design.

There are several common methods used to clean coins, including chemical cleaning, mechanical cleaning, and abrasive cleaning. Chemical cleaning involves placing the coin in a chemical solution that dissolves dirt, grime, or other contaminants on the surface. While this can be effective, it can also damage the surface and toning of the coin.

Acidic solutions can corrode the metal and lead to pitting or discoloration.

Mechanical cleaning involves the use of tools such as brushes, erasers, or ultrasonic cleaners to remove dirt and other contaminants from the surface of the coin. This method can also cause damage to the coin, especially if the tool is too abrasive or if too much pressure is applied. Scratches and other surface damage can significantly decrease the value of the coin.

Abrasive cleaning involves the use of abrasive materials such as sandpaper or steel wool to remove contaminants from the surface of the coin. This method is generally not recommended as it can cause significant damage to the surface and design of the coin.

In addition to damage caused by the cleaning method itself, cleaning can also remove or alter the natural toning and patina that has developed on the coin over time. This can be a significant factor in determining the value of the coin. Collectors often prefer coins with natural toning and patina as it adds to the character and history of the coin.

Overall, the degree to which cleaning devalues a coin depends on the method and level of cleaning, as well as the preferences of individual collectors. In general, it is recommended to avoid cleaning coins whenever possible and to leave them in their original state.

Can coins be cleaned before selling?

Yes, coins can be cleaned before selling, but it is important to keep in mind that cleaning methods may affect the value of the coin. If the coin is a rare or valuable collectible, it is highly recommended to not attempt to clean it and instead seek out a professional coin dealer or numismatist for advice on preservation and handling.

If the coin is a common type that does not hold significant numismatic value, it may be acceptable to clean it to make it more visually appealing for sale or display. However, cleaning methods should be gentle and non-invasive to avoid damaging the surface or altering any important details of the coin.

Common cleaning methods include soaking the coin briefly in distilled water or using a mild soap solution and a soft-bristled brush to remove dirt or grime. It is important to avoid harsh chemicals, abrasive materials, or excessive rubbing that may cause scratches or wear to the coin.

Overall, whether or not to clean a coin before selling depends on the specific circumstances and condition of the coin. It is always recommended to do thorough research and consultation of professionals before attempting any cleaning or preservation methods on coins.

How much value is lost when a coin is cleaned?

When a coin is cleaned, there is potential for a significant amount of value to be lost. The value of a coin is determined by many factors, including its rarity, condition, and history. The process of cleaning a coin can damage it in a number of ways, potentially causing a decrease in its value.

One of the main ways that value can be lost during cleaning is through the removal of the natural patina on the coin’s surface. Many coins develop a layer of patina over time as a result of exposure to the elements. This patina can be considered part of the coin’s history and is often viewed as a desirable feature by collectors.

While a coin may look more visually appealing after it has been cleaned, the removal of its natural patina can be viewed as damaging to its historical value.

Another way that coins can lose value through cleaning is through the use of harsh chemicals or abrasive cleaning techniques. Coins are delicate objects and can be easily scratched or otherwise damaged if handled improperly. The use of harsh chemicals can cause corrosion or other forms of damage to the surface of the coin, further compromising its value.

In addition to physical damage, cleaning can also affect a coin’s grade. Coins are graded on a scale based on their condition, with higher grades indicating that a coin is in better shape. Even if a coin is not physically damaged during cleaning, it can still lose value if it is graded lower as a result of cleaning-related issues.

It’s also worth noting that some coins are not meant to be cleaned at all. For example, coins that have a special finish, such as proof coins, can be damaged if they are cleaned using the wrong techniques. In these cases, attempting to clean the coin can cause irreversible damage and significant loss of value.

Overall, the amount of value lost when a coin is cleaned can vary widely depending on the coin and the cleaning technique used. While some coins may only lose a small amount of value, others may be significantly devalued by cleaning. As such, it’s important to carefully consider the potential risks and benefits before attempting to clean a coin.

If in doubt, it may be best to consult with a professional coin dealer or restoration expert to ensure that the coin is cleaned properly and its value preserved.

What do professionals use to clean coins?

Professionals who are responsible for cleaning coins typically use specialized cleaning solutions and tools that are designed specifically for the purpose of cleaning and maintaining coins.

One common cleaning solution that professionals use is known as “coin cleaner.” This solution typically contains chemicals that are specifically formulated to dissolve and remove dirt, grime, and other contaminants that may have accumulated on the surface of a coin. These solutions must be used carefully, however, as some may be too harsh and could cause damage to the surface of the coin.

In addition to specialized cleaning solutions, professionals also use a variety of tools to carefully and gently clean coins. One common tool that is used is a soft-bristled brush. This brush is used to gently scrub the surface of the coin, removing any dirt or grime that may be on it.

Another tool that is often used by professionals is a small, handheld polishing wheel. This tool can be used to gently buff the surface of a coin, removing any scratches or other imperfections that may be present.

It is important to note that while professionals may use these tools and solutions to clean and maintain coins, it is generally recommended that collectors and enthusiasts avoid cleaning coins themselves. This is because improper cleaning techniques or harsh cleaning solutions can cause irreparable damage to the surface of a coin, decreasing its value and overall condition.

Instead, it is generally recommended that collectors and enthusiasts leave the cleaning and maintenance of their coins to professionals who have the knowledge, experience, and tools to do so safely and effectively.

Can I use muriatic acid to clean coins?

The use of muriatic acid, also known as hydrochloric acid, for cleaning coins is a topic of debate among coin collectors and cleaning experts. Muriatic acid is a strong and corrosive acid that is commonly used for industrial cleaning purposes. However, the use of this acid for cleaning coins is not recommended due to several reasons.

Firstly, muriatic acid is a strong acid that can easily dissolve the metal surfaces of coins. The acid reacts with the copper and zinc metals found in most coins, which can lead to the formation of unsightly stains and discoloration. Moreover, the acid can also remove the patina or the natural protective layer that forms on the surface of coins over time, which can significantly reduce their value.

Secondly, the use of muriatic acid for cleaning coins can be dangerous and pose a significant risk to your health. Muriatic acid is a strong acid that can cause severe burns and damage to your skin, eyes, and respiratory system if it comes in contact with them. Furthermore, the acid releases fumes and vapors that can irritate your lungs and cause respiratory problems.

If you are looking to clean your coins, it is recommended that you use a milder cleaning agent that is specifically designed for coins. These cleaning agents are formulated to clean coins without damaging their surfaces or removing their natural patina. Additionally, these cleaners are safe to use and pose no risk to your health.

The use of muriatic acid for cleaning coins is not recommended due to its corrosive nature and the risks it poses to your health. It is better to use a milder cleaning agent that is specifically designed for coins to ensure their longevity and value.

Is rubbing alcohol good for cleaning coins?

Rubbing alcohol is a common cleaning agent used for various purposes, including cleaning coins. However, the effectiveness of rubbing alcohol for cleaning coins will depend on several factors, including the type of coins and the level of dirt or grime buildup on the surface.

Firstly, it is important to note that rubbing alcohol can damage certain types of coins, especially those made from copper or bronze. The alcohol can react with the metal and cause discoloration or even corrosion over time. Therefore, it is recommended to avoid using rubbing alcohol on antique or valuable coins.

For modern coins or those with minimal dirt, rubbing alcohol can be an effective cleaning solution. The alcohol can dissolve oils and grime buildup, leaving the surface of the coin looking clean and shiny. To use rubbing alcohol for cleaning coins, you can simply apply a small amount to a soft cloth or cotton swab and gently rub the surface of the coin.

However, if the coin has a significant amount of dirt or rust buildup, rubbing alcohol alone may not be sufficient to remove it completely. In such cases, it may be necessary to use a specialized coin cleaning solution or seek advice from a professional coin dealer or conservator.

While rubbing alcohol can be an effective cleaning solution for some coins, it may not be suitable for all types or levels of dirt accumulation. It is important to consider the specific circumstances before using rubbing alcohol or any cleaning agent on coins to avoid causing damage or reducing their value.

What removes corrosion from coins?

Corrosion in coins is a common issue that affects the appearance and overall value of the coin. Corrosion happens when the coin is exposed to different types of elements, such as moisture, chemicals, and even human contact. Over time, corrosion can cause the coin to develop rust, grime, and other forms of discoloration.

Fortunately, there are several methods that can be used to remove corrosion from coins.

One of the most important things to keep in mind is that the method used to remove corrosion will depend on the type of coin and how severe the corrosion is. For instance, if the coin is very old and has a lot of corrosion, it may be best to leave the coin as it is and simply appreciate its historical value.

However, if the coin is not very old and has minimal corrosion, there are several methods that can be used to remove the corrosion without damaging the coin.

One of the most popular methods for removing corrosion from coins is to use a chemical solvent. These solvents are specifically designed to break down the rust and other forms of corrosion on the coin’s surface. However, it is important to use a solvent that is safe for the type of coin you are working with to avoid further damage.

Commonly used solvents include acetone, baking soda, vinegar, and lemon juice.

Another popular method for removing corrosion from coins is to use a gentle abrasive material, such as a soft cloth, toothbrush, or eraser. These materials can be used to gently scrub the surface of the coin and remove the corrosion buildup. It is important to be gentle with the coin to avoid scratching or damaging the surface.

Lastly, some people prefer to use a specialized cleaning solution that is specifically designed for coins. These cleaning solutions are formulated to remove corrosion and other forms of discoloration from coins without damaging the surface or affecting the coin’s value. However, it is important to use a high-quality cleaning solution that is recommended for the type of coin you are working with to avoid damaging the coin.

The methods for removing corrosion from coins are highly dependent on the type of coin and severity of the corrosion. It is important to carefully research and test the chosen method before applying it to the coin to avoid further damage. the best way to prevent corrosion in coins is to store them properly in a dry and climate-controlled environment.

Can you clean coins with ammonia?

Cleaning coins using ammonia is a tricky process and requires some precautions to be taken before attempting it. Ammonia is a strong chemical that can react with metal, and if not used in the correct way can damage the coins. Therefore, it is important to be cautious when using ammonia to clean your coins.

To begin with, ammonia should not be used on coins that have any historic or collectors’ value. Cleaning coins with any method may reduce the coin’s value, so it is best to avoid cleaning any rare or valuable coins. It is also important to wear protective gloves and goggles when handling ammonia, as it is a toxic substance that can cause harm if it gets in contact with your skin or eyes.

The next step is to create a cleaning solution by mixing ammonia with distilled water. It is recommended to dilute the ammonia with a 1:5 ratio, which means one part ammonia for every five parts of distilled water. Place the coin into this solution for a short period of time – no longer than a minute or two – before gently rubbing it with a soft-bristled toothbrush.

Be very careful not to scrub too hard or rough as it can damage the coin’s surface.

After brushing, rinse the coin under running distilled water and pat it dry with a soft cloth. Do not use tap water, as it contains minerals that can leave stains on coins. Another important point to remember is never to soak your coins in ammonia or any other cleaning solution – it can cause a chemical reaction that can damage the coin’s surface, resulting in a loss of value.

While ammonia can be used to clean coins, it is not recommended for any collectors’ or valuable coins. If you choose to use ammonia, be sure to dilute it, only soak the coin briefly, and rinse it thoroughly to avoid any damage. It is always best to consult with professionals before attempting to clean any coins to ensure you do not cause any harm to your collection.

Does acetone damage coins?

Acetone is a colorless, flammable, and volatile solvent that can be commonly found in nail polish remover, paint thinner, and various cleaning agents. There has been some debate surrounding the use of acetone on coins, with some experts claiming that it can damage them, while others stating that it can be a safe and effective cleaning agent for certain types of coins.

On one hand, the use of acetone on coins can be damaging if not done correctly. The chemical can dissolve the protective layer of dirt and other debris on the surface of the coin, but it can also dissolve the metal in the coin as well. This can lead to pitting, scratching, and discoloration, which can ultimately reduce the value of the coin.

Additionally, some coins can be more vulnerable to damage than others. For example, coins made of copper or bronze can be more susceptible to damage from acetone than coins made of silver or gold. This is because copper and bronze coins can be more reactive and prone to tarnishing than other metals.

On the other hand, there are some experts who believe that acetone can be a safe and effective cleaning agent for certain coins. They argue that if used correctly, acetone can gently remove debris and restore the appearance of the coin without causing any damage. This involves using a small amount of acetone on a cotton swab or cloth and gently rubbing the surface of the coin, taking care not to apply too much pressure or leave the coin in contact with the chemical for too long.

Whether acetone is safe to use on coins or not depends on a variety of factors, including the type of coin, age of the coin, and the level of build-up on the surface of the coin. It is always recommended to seek the advice of a professional coin dealer or conservation expert before attempting to clean or restore a valuable coin, in order to avoid potential damage or loss of value.

Can vinegar damage coins?

Yes, vinegar can damage coins.

Vinegar is an acid, and when in contact with certain metals, it can cause a chemical reaction that can lead to the corrosion of the metal. Coins are made of various metals or alloys, including copper, silver, and nickel, which are all prone to corrosion when exposed to acid.

The acidity of vinegar can dissolve the protective layer on the surface of the coin, which can expose the metal to air and moisture, accelerating the process of corrosion. Over time, this can cause the coin to lose its value and become structurally weakened, leading to further damage.

It is worth noting that the severity of the damage vinegar can cause to coins depends on several factors, such as the concentration of vinegar used, the duration of exposure, and the type of metal or alloy used to make the coin. Certain coins may be more resistant to corrosion than others, but it’s still best to avoid exposing them to acidic substances like vinegar if possible.

Using vinegar as a cleaning agent for coins is not recommended, as it can damage the metal and potentially reduce its value. If you’re looking to clean your coins, there are safer and more effective methods, such as coin-cleaning solutions or professional coin-cleaning services.

Resources

  1. How to Effectively Clean a Penny and Other Old Coins
  2. How to Clean Coins | Should I Clean My Coins?
  3. How to Clean Coins Without Devaluing Them – ManMadeDIY
  4. How To Clean Old Coins (Hint: Don’t!) – Vintage Cash Cow Blog
  5. 3 Ways to Clean Old Coins – wikiHow