We often pick up a piece of jewellery, feeling its weight, admiring its gleam, and imagining the stories it might tell. But have you ever stopped to think about what's actually in that beautiful trinket, especially when it touches your skin?
It turns out, there are some important rules about what metals can be used in jewellery, particularly when it comes to things that have direct and prolonged contact with our skin. Think earrings, watch straps, even the little rivets on your favourite jeans. The UK, following its departure from the EU, still largely adheres to regulations that were in place, primarily stemming from the REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) legislation. This isn't just about making things look good; it's about our health.
The Unseen Elements: Nickel, Lead, and Cadmium
Three metals often come under scrutiny: nickel, lead, and cadmium. Nickel is incredibly common, found in trace amounts in many metals. While not inherently dangerous in small, contained quantities, it's a known allergen for many people. When jewellery releases nickel too quickly and stays in contact with the skin for extended periods, it can cause irritating reactions.
Lead, on the other hand, is a heavy metal that's toxic. It doesn't break down easily in the environment and can accumulate in our bodies over time. Historically, it was added to jewellery to give pieces more weight, make colours brighter, or to help soften plastics used in accessories. Cadmium is another heavy metal with similar concerns. It's been used in both fashion and fine jewellery for its ability to improve metal alloys, act as a solder, or even as a pigment. However, like lead, cadmium is recognised as a toxin and a carcinogen, posing risks if ingested or inhaled.
The Safety Net: What the Regulations Mean
So, what does this mean for the jewellery we wear? For products designed to go into piercings – like the posts of earrings – there are very strict limits on how much nickel can be released: less than 0.2 micrograms per square centimetre, per week. For all other items that touch your skin for extended periods, the limit is a bit higher, but still controlled: no more than 0.5 micrograms per square centimetre, per week. This applies to necklaces, bracelets, rings, watch cases, and straps.
There's a bit of leeway if a product has a coating. If that coating is robust enough to prevent nickel release above the safety limit for at least two years of normal use, it can still be supplied. Testing for these releases is done using specific, standardised methods, ensuring a consistent approach.
Lead is also heavily restricted. If the concentration of lead in any part of a piece of jewellery is 0.05% by weight or more, it's not permitted to be supplied. These regulations are in place to protect us, ensuring that the beautiful adornments we choose don't come with hidden health risks. It’s a good reminder that sometimes, the most important qualities of jewellery aren't visible at first glance.
