The short answer: chemistry, materials, a barrier, and a report
Neither "hypoallergenic" nor "nickel-free" has a legal definition for jewelry in the EU, yet both get printed on cards. What the law restricts is nickel release, under REACH Annex XVII entry 27, and what documents it is a laboratory result such as EN 1811. Three things have to be true at the factory before the words are safe: the bath chemistry, the metals that touch skin, and the barrier over the plated surface.
Why nickel, of all metals
Of all the metals used in jewelry, nickel causes the most skin reactions, and it is not confined to cheap pieces: 18K gold plating baths frequently contain nickel, so it can sit in the chemistry of a respectable-looking product rather than in its base. The EU restriction targets release rather than presence, so the same alloy can pass on one build and fail on another. A card reading "nickel-free" skips that nuance.
Where the two words stand in law
Nowhere specific. Neither word is defined in law for jewelry, so a supplier can print both without documenting a thing, and any brand repeating them takes on the exposure. Marketplace rules act where the law does not: Amazon removes listings carrying unsupported hypoallergenic claims. The way out is a measured result reported per method, not a stronger adjective; the EU lead, cadmium and nickel limits are the figures behind it.
Three points where a reaction starts
The plating bath. Bath chemistry is the first decision, and the easiest to leave unstated. For a sensitive-wearer line, confirm in writing whether the bath is nickel-free; not every product needs the upgrade. Raise the question at sourcing, because raising it after the cards print means reprinting them.
The posts and wires. The post sits against skin longer than any other part of an earring. The dependable low-reactivity picks are 316L stainless steel and 925 sterling silver, and the grade belongs in the quotation; a bare "surgical steel" label documents nothing. Hooks and wires follow the same rule, and the earrings manufacturing page covers how post material is quoted per design.
The layer stack and the isolation coat. Structure does as much work as chemistry. Qiuqiu Atelier's plated jewelry runs the four-layer stack of base nickel seal, copper layer, gold color layer and protective top coat, and on a sensitive-skin line the top coat does isolation duty as well as tarnish duty. It is the clear e-coat barrier between the plated surface and skin: ask whether it is there, and exactly what material it is. The four-layer breakdown covers the build order; the tarnish-free spec guide covers the barrier from the durability side.
The checklist we would attach to the purchase order
- Posts and wires: 316L stainless steel or 925 silver, grade written into the quote
- Bath chemistry: nickel-free, confirmed for lines aimed at sensitive wearers
- Layer stack: four layers in sequence, top coat included
- The e-coat isolation layer, covering the plated surface
- An EN 1811 report on the finished piece
- Claim wording signed off before artwork goes to print
Five lines are the factory's work; the sixth belongs to the brand, and it is the one a marketplace review tests.
What to print instead of the adjective
Swap those two adjectives for a sentence built on the method: nickel release tested to EN 1811, report available on request. Longer, duller, and impossible for a reviewer to dismantle. At Qiuqiu Atelier, compliance paperwork for REACH, EN 1811, GPSR and CPSIA is available on request; the compliance documents list sets out what each covers, and the EN 1811 compliance guide covers the testing route.
When the wires were the problem
The following is an illustrative scenario, not a claim about a named customer or a published Qiuqiu Atelier order.
A brand rolled out a sensitive-skin earring collection after checking its plating and topcoat. Reactions still arrived, and they clustered: not across the range, but on one design whose hooks had never been specified past the word "steel." The remedy was unglamorous — name the grade, 316L; hold an EN 1811 report on the finished piece; print the test result instead of the adjective. The claim got longer and quieter, and the returns stopped.
Settle the bath chemistry, the post grade and the report behind the finished piece before production starts, and send the design, the quantity and the destination market through the Qiuqiu Atelier quote form.
FAQ
Is a nickel-free plating bath necessary for every line?
No. It depends on what the line claims and who it is sold to. A general fashion line can document nickel release instead, through an EN 1811 report on the finished piece. A sensitive-wearer line should confirm the bath chemistry in writing at sourcing, the cheapest moment to change it.
Which materials should ear posts and wires be made from?
For posts, hooks and wires, the dependable picks are 316L stainless steel and 925 sterling silver, named in the quotation rather than summarized as surgical steel. A written grade is what makes the material checkable months later.
How does the topcoat reduce reaction risk?
The e-coat layer sits between the plated surface and skin, so on a sensitive line it works as an isolation barrier on top of its tarnish job. Confirm the layer is present and that it is actually e-coat rather than an unnamed finish. Chemistry and structure work together: the same bath performs differently depending on what covers it.
What does an EN 1811 report actually show?
It reports nickel release measured on the finished item, using the laboratory method for items in prolonged skin contact. Entry 27 of REACH Annex XVII sets the limit the test measures against. Ask for the report tied to your style, and read the item tested, the method and the result.
Can I still say hypoallergenic if only the posts are upgraded?
Not as an absolute claim: every component, bath chemistry included, would have to support it. A safer sentence describes what was measured, such as nickel release tested to EN 1811 with the report available on request. Keep the adjective off the card until the whole build can document it.