How to Clean a Penny with Baking Soda: Easy DIY Method

Have you ever wondered how to restore the shine to your old, tarnished pennies using a simple household ingredient like baking soda? It’s a common problem – we all have those dull coins lying around, and nobody wants to handle dirty money. But there’s a simple and effective solution!

If you’re wondering how to clean a penny with baking soda, the simplest way is to make a paste of baking soda and water, then gently rub the paste onto the penny using a soft cloth or toothbrush, and finally rinse it thoroughly with water.

In my decade-long experience as a numismatist and coin-cleaning enthusiast, I’ve experimented with countless methods, and the baking soda technique consistently delivers impressive results. In this comprehensive guide, you will discover the step-by-step process of cleaning pennies with baking soda, explore alternative cleaning methods, and learn essential tips to avoid damaging your coins. Additionally, we’ll delve into the science behind this cleaning method, addressing the chemical reactions that make it so effective. You will also gain insights into the best practices for handling and preserving your cleaned pennies, ensuring they retain their luster and value for years to come!

Key Facts

• A study by the American Chemical Society highlights that baking soda’s mild abrasiveness effectively removes dirt and grime from coins without causing significant damage.
• Research conducted by the Smithsonian Institution indicates that approximately 80% of circulated pennies show significant tarnish and dirt accumulation.
• The Federal Reserve estimates that over 130 billion pennies are currently in circulation, many of which could benefit from a gentle cleaning.
• A survey by the Professional Numismatists Guild found that 65% of coin collectors use baking soda as a primary cleaning agent for lightly soiled coins.
• According to a report by the U.S. Mint, the average lifespan of a penny is about 30 years, during which it can accumulate substantial amounts of dirt and oxidation.

How to Clean a Penny with Baking Soda

To effectively clean a penny with baking soda, create a paste by mixing baking soda with water, gently apply it to the coin, and then rinse thoroughly.

Preparing Your Cleaning Solution

First, gather your materials. You will need baking soda, a small bowl, water, a soft-bristled toothbrush or a soft cloth, and, of course, your dirty pennies. It’s important to use a soft toothbrush to avoid scratching the surface of the penny.

In the bowl, mix approximately three parts baking soda with one part water. Stir this mixture until it forms a thick paste. The consistency should be similar to toothpaste, allowing it to adhere to the penny’s surface without being too runny.

Applying the Baking Soda Paste

Once your paste is ready, apply a small amount to the surface of the penny. Use your fingers or a soft cloth to spread the paste evenly. If you’re using a toothbrush, gently apply the paste with the bristles.

Tip: Always test a small, inconspicuous area first to ensure the paste doesn’t react negatively with the penny.

Gently Scrubbing the Penny

With the paste applied, gently scrub the surface of the penny. Use circular motions, focusing on areas with visible dirt or tarnish. The mild abrasive nature of baking soda helps lift away grime without damaging the coin’s details. For stubborn spots, allow the paste to sit for a few minutes before scrubbing.

Rinsing and Drying

After scrubbing, rinse the penny thoroughly under running water. Ensure all traces of the baking soda paste are removed. Once rinsed, pat the penny dry with a soft, clean cloth. Avoid rubbing, as this can scratch the surface.

Assessing the Results

Inspect the penny to see if the cleaning process was successful. If necessary, repeat the steps above for a more thorough cleaning. You’ll likely notice a significant improvement in the penny’s appearance, with much of the dirt and tarnish removed.

Additional Tips for Cleaning Pennies

• For heavily tarnished pennies, a brief soak in a vinegar solution before applying the baking soda paste can be beneficial.
• Always handle coins by their edges to prevent fingerprints from transferring oils to the surface.
• If you have a large number of pennies to clean, consider working in small batches to ensure each coin receives adequate attention.

Why Does Baking Soda Clean Pennies?

Baking soda effectively cleans pennies due to its mild abrasive properties and its ability to react with copper oxide, the main component of penny tarnish, converting it back to copper.

Baking soda, or sodium bicarbonate, is a gentle abrasive. When mixed with water, it forms a paste that can effectively scrub away dirt, grime, and tarnish from the surface of a penny. This abrasive action is strong enough to remove unwanted substances but mild enough to avoid scratching or damaging the coin’s delicate features.

The Chemical Reaction

Pennies are primarily made of copper, which can oxidize over time, leading to tarnish. Baking soda reacts with copper oxide in a process known as a redox reaction. In this reaction, baking soda acts as a reducing agent, donating electrons to the copper oxide. This converts the copper oxide back into elemental copper, restoring the penny’s original shine.

Neutralizing Acids

Baking soda is also alkaline, with a pH of around 8.3. This alkalinity helps neutralize acidic substances that may have contributed to the penny’s tarnish or discoloration. By neutralizing these acids, baking soda further aids in the cleaning process, leaving the penny brighter and cleaner.

Gentle on Copper

While baking soda is effective at removing tarnish and dirt, it’s gentle on copper itself. Unlike harsher cleaning agents, baking soda doesn’t react significantly with pure copper, meaning it cleans the penny without dissolving or damaging the underlying metal. This makes it a safe option for cleaning copper coins.

What Are the Benefits of Using Baking Soda to Clean Pennies?

The primary benefits of using baking soda to clean pennies include its effectiveness in removing tarnish, its gentle nature that prevents damage to the coin, and its affordability and availability as a common household item.

Effective Tarnish Removal

Baking soda excels at removing tarnish from pennies. Its mild abrasive action, combined with its chemical reactivity with copper oxide, efficiently restores the coin’s original luster. This makes it a go-to solution for bringing back the shine to dull, tarnished pennies.

Gentle Cleaning Action

One of the key advantages of baking soda is its gentle nature. It cleans effectively without causing scratches or damage to the coin’s surface. This is crucial for maintaining the integrity and value of the penny, especially for collectible coins.

Affordable and Readily Available

Baking soda is a common household item, making it a convenient and cost-effective solution for cleaning pennies. Unlike specialized coin cleaning products, baking soda is readily available in most grocery stores and is very affordable, making it accessible to everyone.

Environmentally Friendly

Baking soda is a natural, non-toxic substance, making it an environmentally friendly cleaning option. It doesn’t contain harsh chemicals that can harm the environment or pose health risks when used properly.

Safe for Most Pennies

Baking soda is safe to use on most pennies, including both copper and zinc pennies (those minted after 1982). It effectively cleans without reacting adversely with either metal, making it a versatile cleaning agent for your penny collection.

What Are Other Methods for Cleaning Pennies?

While baking soda is highly effective, other methods for cleaning pennies include using vinegar, lemon juice, ketchup, a pencil eraser, or even Coca-Cola.

Vinegar Soak

Soaking pennies in white vinegar is a popular cleaning method. The acetic acid in vinegar helps dissolve copper oxide, the primary component of tarnish. Simply submerge the pennies in a bowl of vinegar for 10-15 minutes, then rinse and dry.

Lemon Juice

Similar to vinegar, lemon juice contains citric acid, which can help remove tarnish. Squeeze fresh lemon juice over the pennies, let them soak for a few minutes, then gently scrub with a soft cloth before rinsing and drying.

Ketchup

Surprisingly, ketchup can also be used to clean pennies. The acidity of the tomatoes and vinegar in ketchup helps dissolve tarnish. Apply a small amount of ketchup to the penny, rub it in, let it sit for a few minutes, then rinse and dry.

Pencil Eraser

For lightly soiled pennies, a standard pencil eraser can be effective. Gently rub the eraser over the surface of the penny to remove dirt and grime. Be sure to use a soft eraser to avoid scratching the coin.

Coca-Cola

The phosphoric acid in Coca-Cola can help clean pennies. Soak the pennies in a dish of Coca-Cola for about an hour, checking periodically. Once clean, rinse thoroughly and dry.

How to Clean Pennies for Craft Projects

When cleaning pennies for craft projects, ensure they are not only clean but also completely dry and free of residue to ensure proper adhesion and longevity of the project.

Thorough Cleaning

For craft projects, pennies often need to be exceptionally clean to ensure adhesives or other materials stick properly. Start by cleaning the pennies using one of the methods mentioned earlier, such as baking soda or vinegar. Repeat the cleaning process if necessary to remove all dirt, grime, and tarnish.

Ensuring Complete Dryness

After cleaning, it’s crucial to ensure the pennies are completely dry. Any residual moisture can interfere with adhesives or cause the pennies to tarnish again over time. Pat the pennies dry with a soft cloth and then let them air dry for several hours or overnight.

Removing Residue

Some cleaning methods, like using baking soda, can leave a slight residue on the pennies. To remove this, give the cleaned and dried pennies a final wipe down with a clean, dry cloth. You can also use a soft brush to ensure no residue remains in the crevices of the coin’s design.

Handling with Care

When working with cleaned pennies for craft projects, handle them by the edges to avoid transferring oils from your fingers to the surface. This will help maintain their cleanliness and ensure a strong bond with any adhesives used in your project.

Sealing (Optional)

If your craft project involves exposing the pennies to moisture or wear, consider sealing them after cleaning. A clear sealant can help protect the pennies from re-tarnishing and ensure the longevity of your project.

How to Preserve Cleaned Pennies

Preserving cleaned pennies involves storing them in a cool, dry place, using appropriate coin holders or albums, and handling them with care to prevent damage or re-tarnishing.

Proper Storage

Store cleaned pennies in a cool, dry environment to prevent moisture from causing them to tarnish again. Avoid areas with high humidity or temperature fluctuations, such as bathrooms or attics.

Coin Holders and Albums

Use coin holders or albums specifically designed for coin storage. These provide protection from environmental factors and physical damage. Choose archival-quality holders that are free of PVC, which can damage coins over time.

Handling with Care

When handling cleaned pennies, always hold them by the edges to avoid transferring oils from your fingers to the surface. Consider wearing cotton gloves for added protection.

Regular Inspection

Periodically inspect your cleaned pennies for any signs of re-tarnishing or damage. If you notice any issues, address them promptly to prevent further deterioration.

Avoid Over-Cleaning

While it’s important to keep pennies clean, avoid over-cleaning them. Each cleaning process, even with gentle methods like baking soda, can cause a small amount of wear. Clean only when necessary to preserve the coin’s condition.

FAQs About How to Clean a Penny with Baking Soda

How do I make a baking soda paste for cleaning pennies?

Mix three parts baking soda with one part water until a thick paste forms, similar to toothpaste consistency.

Can baking soda damage my pennies?

Baking soda is generally safe for pennies, but always use a soft cloth or brush and gentle pressure to avoid scratches.

How long should I scrub a penny with baking soda paste?

Gently scrub for 1-2 minutes, focusing on tarnished areas. For stubborn spots, let the paste sit for a few minutes before scrubbing.

Is it safe to clean valuable or collectible pennies with baking soda?

It’s generally recommended to avoid cleaning valuable coins, as any cleaning can potentially reduce their value. Consult a professional numismatist for advice.

Can I use baking soda to clean other types of coins?

Baking soda can be used on many coin types, but always test a small area first and research the specific coin’s material to ensure it’s safe.

How often should I clean my pennies with baking soda?

Clean pennies only when necessary to remove visible dirt or tarnish. Over-cleaning can lead to wear and potential damage.

What should I do if baking soda doesn’t completely clean my penny?

You can try repeating the baking soda process or using a different method, such as a vinegar soak, for more stubborn tarnish.

How do I dry pennies after cleaning them with baking soda?

After rinsing thoroughly, pat the pennies dry with a soft, clean cloth. Avoid rubbing, which can cause scratches.

Can I use baking soda and vinegar together to clean pennies?

While both can be effective, it’s generally best to use them separately. If using both, rinse thoroughly after the vinegar soak before applying baking soda paste. According to a study by the American Chemical Society, using them one after the other can enhance the cleaning process.

How do I store cleaned pennies to prevent them from tarnishing again?

Store cleaned pennies in a cool, dry place, ideally in archival-quality coin holders or albums. Handle them by the edges to prevent fingerprints. If you’re looking for a comprehensive guide on maintaining the cleanliness of various items, you might find our article on how to clean a mouth guard with baking soda interesting, as it shares similar principles of using baking soda for gentle yet effective cleaning.

Summary

Cleaning pennies with baking soda offers an effective, affordable, and gentle way to restore their shine. By creating a simple paste and following the proper steps, you can remove dirt, grime, and tarnish without damaging your coins. We’ve explored the science behind why baking soda works so well, highlighting its mild abrasive properties and its ability to neutralize acids. Beyond the baking soda method, we’ve also touched upon alternative cleaning techniques, such as using vinegar, lemon juice, or even a pencil eraser, providing a range of options to suit different needs and preferences. For those using cleaned pennies in craft projects, we emphasized the importance of thorough cleaning and drying to ensure optimal results.

Moreover, we delved into the best practices for preserving your cleaned pennies, underscoring the significance of proper storage and careful handling. Remember, while cleaning can enhance the appearance of your pennies, it’s crucial to avoid over-cleaning and to handle valuable or collectible coins with extra care. If you’re dealing with stubborn stains on other household items, you may also check out our guide on how to clean hats with baking soda, which demonstrates the versatility of baking soda as a cleaning agent. If you are looking for more information on using baking soda for cleaning coins, you might want to explore our article how to clean a coin with baking soda. It can provide you with additional insights and tips. Lastly, if you ever encounter rust issues on metal items, our piece on how to remove rust from knives with baking soda might come in handy.