Zinc Alloy Bra Underwire for Sneakers — Specification, Uses and Sourcing Notes
Zinc Alloy Bra Underwire for Sneakers: Specification, Uses and Sourcing Notes
Zinc Alloy Bra Underwire is the version buyers specify for sneakers when the base material is fixed by performance rather than by price. This entry sets out what the material actually changes, which specification to write into the tech pack, and where the cost sits — the three questions that decide whether the item passes bulk approval.
What it is
Zinc Alloy gives bra underwire its drape and hand feel. In practice that means the trim behaves differently in cutting, in finishing and in wear: plating and coating adhesion must be tested on the actual base. Buyers who specify the material up front avoid the most common failure — an item that looks right on the sample card and behaves differently in bulk.
Typical specification
| Item | Bra Underwire |
|---|---|
| Base material | Zinc Alloy |
| Standard size | 9 mm Width |
| Common finishes | Epoxy Doming, Yarn-Dyed Finish, Nickel-Free Electroplating |
| Processes | Weft Knitting, Injection Moulding, Digital Printing |
| Typical application | Sneakers |
| Related applications | Boots, Baby Clothing, Underwear, Outdoor Tents |
| Test standard | REACH SVHC Screening |
| Usual packing | 200 pieces per polybag, 10000 per carton |
Properties that matter in buying
- Dimensional stability — 2% allowance is built into the spec before cutting.
- Colour fastness — tested to REACH SVHC Screening on the actual base material, not on a substitute.
- Mechanical performance — elastic recovery after 30 cycles or washes.
- Compliance — REACH SVHC Screening documentation issued with the shipment.
- Consistency — the approved counter sample becomes the reference for every reorder.
Common uses
- Trousers
- Shirts
- Down Jackets
- Kidswear
- Boots
- Sleepwear
How to specify it
- Name the base material in the tech pack, not just the item.
- Fix the size and tolerance in writing before sampling starts.
- Approve a counter sample made from the actual bulk base material.
- Order the test report against the standard your market requires.
- Retain a golden sample at the factory and a second one with you.
Related reading
Related specifications on this site cover anti-slip tape, rubber patch, resin button, cotton webbing, and the processes most often paired with bra underwire include uv protection finishing, yarn dyeing, anti-pilling finish.
Tell us the item, the quantity and the delivery window. We will quote it with the sub-processes named, so the lead time you approve is the lead time you get.
