Due to its natural goodness and visual appeal, copper finds space in our homes in the form of artefacts, utensils and intricately designed jewellery. Precious as it is, copper tends to gather tarnish quite easily. Here are some natural ways to deal with this tarnish – easy-to-clean or stubborn.
See also: How to clean silver at home?
Why does copper tarnish?
Copper tarnish is the result of its reaction with oxygen, which produces copper oxide. This process is called oxidation. Copper’s long exposure to air results in a thin, aqua-green or blue protective coating, known as patina. Patina is a mixture of hydroxycarbonate, hydrosulfite and other compounds. While those with an artistic vision view patina as a sign of age and an expression of beauty, others view it as stubborn tarnish.
In households, copper items develop a black-brown colouration due to frequent human touch, oxygen, moisture, dust and chemicals. When left unattended, this tarnish develops into corrosion. Instant corrosion of household copper articles can also be caused by heat and acidic compounds found in edibles, such as vinegar, wine and milk.
Tarnished copper items can be visually less appealing. If not careful, they can cause copper toxicity. Therefore, it is extremely important to clean copper items regularly, especially copper utensils.
10 natural ways to clean copper
Tomato
Apply tomato paste on the copper surface. Let it sit for a few minutes. Rinse with dish soap and warm water.
Ketchup
Rub tomato ketchup on copper and let it sit there for about 30 minutes. After 30 minutes wipe it off. Use warm water and dish soap to wash the item. Pat dry it with a soft cloth.
Tamarind paste
This acidic fruit is highly effective in dealing with copper tarnish. Use the same timeframe and method as ketchup to clean your copper items using tamarind paste.
White vinegar and salt
Dissolve one and a half teaspoon of salt in a cup of white vinegar. Apply this mixture on copper items with a soft cloth or spray bottle. Leave this on for 30 minutes and then wash it off with warm water.
Lemon and salt
This is meant for gentle cleaning of fresh tarnish. Slice a lemon in half. Sprinkle some salt on it and rub it on the item for about 10 minutes. Rinse the item clean and pat dry it with a soft cloth.
Lemon juice and baking soda
For older and stubborn tarnish, mix equal parts of lemon juice and baking soda. Apply this mixture with a soft cloth. Rinse 30 minutes after this treatment.
Lemon, salt and cornstarch
To remove stubborn tarnish, mix equal parts of salt, non-iodised cornstarch and lemon juice to make a paste. Apply this paste on the copper surface with a microfiber cloth. Leave it on for several hours, rinse the article with warm water and pat dry.
Vinegar, salt and flour polish
To treat stubborn tarnish, mix three tablespoons of flour and salt each. Using vinegar, make a thick paste and apply it on copper items with a soft cloth. Put the items in individual plastic bags and leave them overnight. Rinse and pat dry the next day.
Lemon juice and cream of tartar
Mix lemon juice and the cream of tartar to make a paste. Using a cloth, apply a thin layer on the copper surface and leave it for about five minutes. Wash the item with dish soap and warm water.
Worcestershire sauce
Using a soft cloth, apply the sauce on the copper surface. Leave it on for 10 minutes before gently rubbing it off. Wash the item with dish soap and warm water. Wipe the water with a soft cloth.
What not to do when cleaning copper?
- Never put copper utensils in a dishwasher. Harsh chemicals can shorten their lifespan.
- Never use cleaners that contain bleach. These can cause copper to corrode and pit.
- Never leave copper items to air dry.
- Never use store-bought harsh cleaning agents.
- Copper utensils must be washed immediately. Leaving them in the sink overnight will harm them.
FAQs
Why does copper tarnish?
Copper’s exposure to air and moisture leads to tarnish and the development of a patina.
What is patina?
Patina is a greenish-blue or brownish film that forms on the copper surface.
Can I use ketchup or tomato sauce to clean copper?
Yes, the natural acidity in tomatoes can break down tarnish.
Are there any DIY methods for preventing copper from tarnishing?
To slow down tarnishing, apply a thin layer of beeswax or a copper-specific metal polish. These act as protective barriers.
How can I clean engraved or intricate copper pieces?
Delicate or intricate copper items may require a gentle approach. Use a soft toothbrush or a cloth wrapped around a cotton swab to clean crevices.
Is it safe to clean antique copper items?
Antique copper items may be more delicate and cleaning them can affect their value. Consult a professional appraiser or conservator.
Can I put copper items in the dishwasher?
No, putting copper items in the dishwasher is not recommended.
How often should I clean my copper items?
Decorative items may require cleaning every few months. Regular items may require more frequent cleaning.
Can I use abrasive materials to clean copper?
Abrasive cleaning methods must be avoided as they would damage the material while cleaning the tarnish.
What should I do if my copper item has stubborn stains or tarnishes?
For stubborn stains or tarnishes, a specialised copper cleaner must be used.
What is copper toxicity?
Copper toxicity occurs due to copper salts, such as blue vitriol (bluestone), copper sulphate and Verdigris.
| Got any questions or point of view on our article? We would love to hear from you. Write to our Editor-in-Chief Jhumur Ghosh at jhumur.ghosh1@housing.com |
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