Case Study: Custom Zipper Slider for a School Uniform Buyer in Brazil
Source:Gold Locket Pendants /
Time:2026-09-18
Zipper Slider for a School Uniform Buyer in Brazil
A School Uniform Buyer approached us with a zipper slider requirement for the Brazil market. The brief was specific: a defined look, a hard launch date and a unit cost that had to survive freight and duty. This case study records what was specified, what went wrong in sampling and how the bulk order was delivered.
The challenge
- Elastic that lost recovery after three washes
- Lead time quoted without the plating or dyeing sub-process
- A zipper puller that broke under pull test at the warehouse
What we specified
| Item | Zipper Slider |
|---|---|
| Client type | A School Uniform Buyer |
| Market | Brazil |
| Order volume | 100,000 pieces across 2 specifications |
| Base material | Zinc Alloy |
| Standard size | 10# Gauge |
| Finish | Silicone Wash Finish |
| Sampling rounds | 3 |
| Delivery window | 4 weeks from PO to ex-factory |
| Compliance | ISO 12947 Abrasion Resistance |
How it was resolved
- We rebuilt the specification around Zinc Alloy and locked the tolerance before bulk.
- The finish was moved to Brushed Silver Finish after strike-off tests showed better durability.
- A pre-production sample was approved and retained as the golden reference.
- Production ran with in-line inspection and a mid-run photo report.
- Cartons were packed to the client's own barcode and ratio specification.
Result
- 100,000 pieces delivered inside the 4-week window.
- Unit cost held within 1.5% of the original quotation.
- Inspection-related rejection stayed under 1.5%.
- The specification is now on file, so reorders reproduce the approved sample.
What we would repeat
Approve a pre-production sample made from the actual bulk base material. Substitute material behaves differently in finishing.
Planning something similar?
Share the programme details and we will propose two alternatives — one optimised for unit cost, one for lead time — and let you choose.
