MagEnergy copper bracelets are made of 99.9% pure copper and have a transparent coating, but it also changes color after wearing about 10 days, because copper is an extremely oxidizable material, when exposed to other chemicals or outside elements, even those as simple as oxygen, copper reacts, leading to changes on its surface. Copper reacts with the oxygen and moisture in a reaction called oxidization, it’s perfectly harmless and is just nature’s way of depositing the minerals onto your skin, how fast this happens depends on the ph balance of your skin and doesn’t affect the way the bracelet works. Pure copper tarnishes naturally and it will not affect its anti-inflammatory actions and germs killing properties.
The acidic nature of human sweat and other chemicals on the skin, such as soaps, lotions and makeup, react with the copper. This reaction causes a green patina or surface coating to form on the copper, and that colour gets transferred onto the skin. The reaction varies according to individual body chemistry, both in how long it takes for the green discoloration to form and in how distinct the colour becomes. Some people might not experience any discoloration at all.
If the copper bracelet you wear turns green or tarnish, here is one very easy way to make the copper bracelet shiny in 1 minute.
Mix 1 oz white vinegar with 1/2 tsp of salt
Dry cloth sock in a mixture of vinegar and salt
Wipe your copper bracelet with the wet cloth
Rinse under water and dry with a soft cloth