TEYING BUYER GUIDE · UPDATED OCTOBER 23, 2026
Stop Tarnish Complaints at the Factory: A Buyer's QC Route
Tarnish is cheaper to spec out than to explain later. Five decisions on the production order decide how long a gold-tone piece stays bright.
Tarnish is a specification outcome, not a care failure
Most tarnish claims arrive the same way: a photo of a dull patch, a date, and a customer who insists the piece never went near a shower. By the time that email lands, six things have already collided. The alloy underneath. The coating build. The top coat. The packing. The weeks the order spent in a stockroom. The wearer's own habits. Only the last of those belongs to the customer. The other five are settled on paper, months before anything is cast.
That is the reframe worth holding on to. Nobody can make a plated piece tarnish-proof. What a buyer can do is decide how quickly the finish degrades, and whether it degrades after a fair run of wear or inside the first fortnight.
Mark the wear points before choosing a material
Take the drawing and trace where the piece will meet the world. A ring band sits against skin and soap all day. A bracelet drags across desk edges and keyboard corners. Chain links grind on each other with every step. Clasp tongues, earring posts and pendant bails take a beating no studio photo ever shows. Those are the spots where a coating gives way first, and naming them in the spec costs nothing.
Shape matters as much as traffic. A broad, gently curved face holds a coating evenly. A knife edge, a deep channel or open filigree does not, because the plating bath reaches those areas at a different rate. If the design carries fine detail, raise it while the piece is still a CAD file. Coverage can be planned around geometry. It cannot be rescued after casting.
Brass and 925 silver age on different clocks
Gold-tone fashion jewelry runs on brass for good reasons. It takes fine detail from the mold, polishes to a clean surface, and keeps unit cost workable across a wide catalog. It is still a base metal. Once the coating thins at a contact point, the brass underneath meets air, moisture and skin, and it darkens.
925 sterling silver brings its own value story and a higher price band, and it tarnishes too. Humidity and sulfur compounds in the air do the work. That is why sterling is usually rhodium plated or sealed with an anti-tarnish coat. The two bases fail at different rates and at different prices, so the right call depends on where the design sits in your range, not on which metal sounds better.
Copper appears in our work as an electroplating base layer, and zinc alloy turns up in some casting routes. Neither is a material line to sell on a product page.
The build: four layers, and a top coat most briefs forget
Gold-tone production at TEYING is a four-layer system: a base seal, a copper layer, the gold color layer, then a protective top coat. The copper stage is what lets the gold color bond tightly and read evenly across the surface. The top coat is the layer buyers ask about least and benefit from most, because it is the only thing standing between the color and the sweat, lotion and perfume that arrive within an hour of the box being opened. Overall thickness lands between 0.5 and 2.5 microns depending on the line.
Vermeil is not a fancier word for plating. It is a specification: 925 sterling silver underneath, 2.5 microns of 18K gold on top. Different price band, different shelf in your assortment.
What to write into the quotation
Two lines do most of the work. Thickness comes first, because a thin flash and a 2.5 micron build are different products and should never share a claim on a listing. Top coat comes second, because it is optional on some orders, and dropping it to shave a few cents is how a collection books a returns problem for the following quarter.
When two suppliers quote the same design, ask each one which thickness and which top coat their number contains. Vague answers are the tell.
One expectation to keep in your own head: heavier coverage buys time, nothing more. It does not end tarnish, and a supplier who calls plating permanent is telling you something about how they handle claims.
Packing works while the order sits still
Moisture and airborne sulfur do their damage during the quiet weeks: in a factory warehouse, inside a container, on your own back shelf. Packaging carries more of the tarnish load than most buyers budget for.
- One piece per anti-tarnish pouch or zip bag, never loose in a carton
- Anti-tarnish paper or a treated card pressed against the metal, not plain tissue
- Desiccant where storage is humid or transit runs long
- Boxes with a coated insert rather than bare board
- SKU-level packing and labeling, so opening one carton does not air out the whole order
Pouches, cards, boxes and barcode labels are each quoted separately, which makes an upgrade easy to weigh against margin. If only one is affordable, take the sealed pouch. A piece that stays closed until the customer opens it arrives in visibly better condition than the same piece riding in an open tray.
The care card earns its cent
Four lines cover most of it. Jewelry goes on after perfume and lotion. It comes off before showers, swimming and workouts. It gets wiped with a soft dry cloth after wear. It goes back into the pouch rather than a bathroom dish.
Add one honest sentence about wear. Plated finishes thin over time, most obviously on rings and bracelets. A customer told to expect gradual wear files far fewer claims than one who was promised a finish that never changes. The wording shifts for vermeil or rhodium plated silver, but the job stays the same: say what the finish is, and what it will do.
Pre-shipment sign-off
| Stage | What gets checked | Hold the carton if |
|---|---|---|
| Color | body, chain, clasp and post read as one tone under neutral light | any part reads warmer or cooler than the signed sample |
| Coverage | edges, link joints, clasp edges, inner band, stone seats, front and back | a dull line or bare patch shows at a contact point |
| Top coat | even sheen along the surface | one area looks matte while the rest is glossy |
| Findings | clasp opens and closes cleanly, no catch, correct spring tension | the clasp slips or needs force on any sampled piece |
| Setting | stone level and tight, seat unscratched, no glue visible | a stone rocks or the seat shows tool marks |
| Consistency | tone, dimensions and finish across the run | the last cartons drift from the first |
| Packing | sealed pouch, right card, right barcode, nothing loose | pieces sit loose or barcodes do not match the SKU |
Two habits keep the table honest. Keep one approved sample per color sealed, labeled and out of the handling pile, because reference pieces that have been touched for months make every new batch look wrong. Then split appearance acceptance from test acceptance. If your market wants lead, nickel or cadmium documentation, or a named test method, say so before production starts. Testing and paperwork are confirmed per material, per destination market and per order scope. One report does not cover every SKU in a line.
Log defects with photographs that show location and scale, and put the rework or replacement process in writing before cartons close. Six months later, a batch record with dates and quantities is what tells you which run a returned piece came from.
None of this makes a plated piece tarnish-free. It makes the wear gradual, expected and explained, which is usually the whole difference between a customer who reorders and one who posts a photo. If you have a design in hand, send a reference image through the quote form and the team will confirm base material, plating route, packing and inspection scope for that specific piece.
FAQ
How long does gold-plated brass stay bright before tarnish appears?
No fixed clock exists. Coating wear is what exposes the brass, and wear depends on thickness, top coat and handling. A four-layer build with the protective coat slows the reaction noticeably, but it delays visible wear rather than preventing it. Rings and bracelets, which take daily contact, usually dull first.
Does sterling silver need different handling than brass?
It tarnishes for a different reason. Humidity and sulfur compounds in the air darken silver, which is why sterling is often rhodium plated or given an anti-tarnish top coat. Storage decides a lot: a silver piece kept sealed with anti-tarnish paper holds its brightness far longer than one left open on a dresser or worn into a pool.
Can packing alone rescue a thin plating job?
No. A pouch slows tarnish while the order sits in storage or transit, and it does nothing for coverage that was thin from the start. Treat pouches, cards and care instructions as protection layered over a proper plating spec, never as the spec itself.
Which thickness should appear on the purchase order?
Match it to the piece, not to the collection. TEYING works between 0.5 and 2.5 microns depending on the project, and vermeil is specified separately at 2.5 microns of 18K gold over 925 sterling silver. Thicker coverage costs more, so the sensible unit for the decision is the SKU rather than the whole range.
Why do rings and bracelets wear before pendants at the same thickness?
Contact frequency and geometry explain it. A ring meets a palm, a desk and water through the day, while a pendant touches fabric now and then. Curved and recessed areas also take plating less evenly than a flat face, so the same micron figure behaves differently on two pieces. That is why daily-wear pieces usually move one tier up.
Build tarnish control into the order.
Send the finish expectations, storage and packaging plan, and QC requirements for a production-level review.
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