Hypoallergenic alloy: what makes a piece nickel-free
"Patricia, I am allergic to demi-fine." You will hear this sentence many times a month. And I will teach you to answer with technical precision, because the client is almost always wrong in her diagnosis — she is allergic to a specific ingredient, not to demi-fine. Knowing what that ingredient is, and how Herreira avoids it, turns a lost sale into a lifelong client.
Module 1 lesson 3 already opened this topic. Here we go deep.
The villain's name is nickel
Between fifteen and twenty percent of women are allergic to nickel. It is not pickiness, it is not rare — it is statistics. Nickel is a metal added to cheap alloys because it is abundant, gives a silver shine and helps stabilize the structure. The problem is it is also one of the most aggressive contact allergens for human skin. On touching sweat, nickel releases ions that penetrate the skin and trigger an immune reaction: redness, itching, peeling, sometimes blisters. The reaction shows up within hours and takes days to fade.
When your client says "any demi-fine hurts me", in nine out of ten cases she is allergic to nickel — not to the 18k plating, not to the brass. Take nickel out of the equation, and the piece works.
Where nickel usually hides
In three main places:
- In the base alloy. Some factories add nickel to brass to lower cost or increase hardness.
- In the intermediate layer. Before the gold bath, certain industrial lines apply a nickel bath as "primer" so the gold bonds better — cheap fix, serious problem for sensitive skin.
- In cheap silver alloys. There are pieces sold as "silver" that actually contain nickel. That is one reason your client who reacts to "silver" is probably reacting to the nickel in cheap silver.
What Herreira does differently in the hypoallergenic line
Our hypoallergenic line swaps two things at once. First, the base is not standard brass — it is a nickel-free alloy formulated to be stable and well-accepted by skin. Second, the intermediate layer before the 18k bath does not use nickel: it uses pure copper or alternative layers that fulfill the same technical role without the allergic risk.
The result is a piece with the same three-microns-or-more 18k plating, the same finishing, the same design — but one that can be worn by women with extremely sensitive skin without triggering a reaction. Yes, it costs the factory more to produce. Yes, it costs your client a bit more. And it is worth every cent because it actually solves the problem.
How to be sure a piece is really hypoallergenic
Here lies a market gap: many brands use the word "hypoallergenic" with no criteria. For real confidence, three things must be present:
- Clear identification by the manufacturer. Herreira marks which pieces are from the hypoallergenic line. If the brand does not tell you, distrust it.
- Controlled supply chain. Whoever makes it must know the exact composition of the alloy and the intermediate layer. Without that, "hypoallergenic" is just marketing.
- Trial on the client. Even the best alloy may react in a minority. If the client has a history of severe allergy, suggest experimental use: a few hours at home before committing to a full day.
The pocket phrase
"Herreira has a nickel-free line made for women who react. The difference is in the base and in the layer before the plating — it is not just a label. Let me show you now the hypoallergenic pieces that match what you want."
What to practice this week
Map your kit, piece by piece, identifying which belong to the hypoallergenic line. Save it on your phone as a list named "no nickel". Then rehearse the pocket phrase three times out loud. When the next allergic client arrives, you do not improvise: you open the list and show her exactly what she can wear.