Case Study: Custom Reverse Coil Zipper for a Bag and Luggage Maker in Singapore
Source:Gold Locket Pendants /
Time:2026-09-18
Reverse Coil Zipper for a Bag and Luggage Maker in Singapore
A Bag and Luggage Maker approached us with a reverse coil zipper requirement for the Singapore 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
- Lead time quoted without the plating or dyeing sub-process
- Shrinkage that only showed up after the first wash
- Shade drift between the approved lab dip and the bulk lot
What we specified
| Item | Reverse Coil Zipper |
|---|---|
| Client type | A Bag and Luggage Maker |
| Market | Singapore |
| Order volume | 100,000 pieces across 4 specifications |
| Base material | Glass |
| Standard size | 10# Gauge |
| Finish | Gunmetal Finish |
| Sampling rounds | 2 |
| Delivery window | 5 weeks from PO to ex-factory |
| Compliance | RoHS |
How it was resolved
- We rebuilt the specification around Glass and locked the tolerance before bulk.
- The finish was moved to Antique Copper 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 5-week window.
- Unit cost held within 1.5% of the original quotation.
- Inspection-related rejection stayed under 0.5%.
- The specification is now on file, so reorders reproduce the approved sample.
What we would repeat
Keep one accountable owner on both sides. Most delays come from hand-offs, not from machines.
Planning something similar?
Send the reference sample or tech pack and we will come back with a costed specification, a sampling timetable and the compliance documents your market requires.
