* Copper Content: Bronze is primarily an alloy of copper and tin. Copper reacts with acids, such as those found in sweat, lotions, or soaps, to form copper salts.
* Copper Salts: These copper salts, like copper chloride or copper sulfate, are green or blue-green in color. They are what stain the skin.
* Polishing Doesn't Prevent It: Polishing a bronze ring makes it look nice, but it doesn't change the fundamental composition of the metal. The copper is still there and will still react.
* Other Factors: The amount your finger turns green depends on several factors:
* Acidity of your sweat: Some people have more acidic sweat than others, leading to a stronger reaction.
* Humidity: Humid conditions can increase the reaction.
* Soap and lotions: These can contain chemicals that accelerate the reaction.
* Thickness of the bronze alloy and the amount of copper.
How to minimize green fingers:
* Apply a barrier: Paint the inside of the ring with clear nail polish. You'll need to reapply it periodically.
* Get it plated: Have the ring plated with a non-reactive metal like rhodium or gold.
* Keep your hands clean and dry: Wash your hands regularly and dry them thoroughly, especially before putting on the ring.
* Choose a different metal: If this is a constant problem, consider rings made from stainless steel, titanium, gold, or silver.