Why Does Metal Tarnish and How to Prevent It? 

Tarnishing is a natural process that occurs when metals like gold, silver and copper react with their environment. While it doesn’t damage the metal, tarnish can dull its appearance. Here’s why it happens and how to keep your jewellery looking its best. 

Why Does Metal Tarnish? 

Tarnishing is a chemical reaction that occurs when metal surfaces react with elements in the environment. Below are some common reasons why: 

• Oxidation: Tarnish forms when metals react with oxygen or sulfur compounds in the air. 

• Moisture and Humidity: High humidity accelerates tarnishing, especially in regions with damp climates. 

• Chemical Exposure: Everyday items like perfumes, lotions or cleaning products can speed up the tarnishing process. 

• Storage Conditions: Improper storage, such as leaving jewellery in open air or in contact with other reactive materials, can lead to tarnishing. 

Which Metals Are Most Prone to Tarnishing? 

While some metals are more resistant to tarnishing, others are highly reactive: 

• Silver: Particularly susceptible to tarnishing due to its reaction with sulphur and oxygen. 

• Copper and Brass: Tarnish quickly when exposed to air and moisture. 

• Gold: Typically resistant but can tarnish if alloyed with other metals. 

• Aluminium and Stainless Steel: Generally more tarnish-resistant but not completely immune. 

How to Prevent Tarnishing 

1. Proper Storage: Store metal items in airtight containers or jewellery boxes with separate compartments to avoid scratching and exposure to air. 

2. Limit Exposure to Chemicals: Avoid wearing jewellery while applying beauty products, cleaning, or swimming in chlorinated pools. 

3. Clean Regularly: Gently clean your jewellery after wearing it to remove oils and dirt. A soft cloth or a mild solution of baking soda and water works well. 

How to Remove Tarnish 

If tarnish does form, it can often be removed with: 

• Polishing Cloths: Use a jewellery polishing cloth to gently buff away tarnish. 

• Commercial Cleaners: Choose a cleaner designed for your specific metal type but always follow the instructions carefully. 

Tarnishing is a natural process, but with the right care and prevention techniques, you can keep your jewellery looking as good as new for years to come. As jewellery makers, understanding how to combat tarnish not only preserves the quality of your pieces, but also enhances their value. 

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