How to protect silver from tarnishing

Silver reacts with sulphur compounds in air, sweat and cosmetics, forming dark silver sulphide on the surface. Humidity, perfume and pollution speed it up. It is chemistry, not quality — even the purest 925 silver will darken over time if unprotected. The good news: the layer can be removed, and better still, it can be delayed already at the factory.

Rhodium is a precious platinum-group metal that does not react with sulphur. A thin electroplated rhodium layer isolates silver from the environment and gives a bright, mirror-like, slightly cool shine. It is the most common protection in premium jewelry. Durability depends on layer thickness — so the manufacturer should specify it. We offer rhodium plating as standard in our electroplating department.

When a brand wants to keep silver’s natural, warmer colour without rhodium, transparent protection is used: chemical passivation or very thin, colourless protective coatings applied to the finished piece. They do not change the look but slow the reaction with sulphur. Their effectiveness depends on careful application and how the piece is worn — so treat them as a complement to good practice, not the only protection.

Protection starts before plating: thorough polishing reduces the reactive surface, careful washing removes paste and acid residues, and packing in sealed bags with anti-tarnish inserts protects the piece in storage and transit. These are details a brand rarely sees, yet they decide how the jewelry looks after a year on a shop shelf.

Honest communication builds trust: “rhodium-plated 925 silver” says more than “does not tarnish”. Include a short care note and point out that oxidation (deliberate darkening) is an intended effect, not a defect — see oxidized silver. Other colouring methods are in how jewelry gets its colour, and our full offer on the jewelry manufacturer page.