Case Study: Custom Invisible Zipper for a Footwear Factory in Poland
Source:Mens Cross Necklace /
Time:2026-09-18
Invisible Zipper for a Footwear Factory in Poland
A Footwear Factory approached us with a invisible zipper requirement for the Poland 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
- Cartons packed to the factory ratio instead of the buyer's size ratio
- A compliance document that arrived after the goods were already shipped
- An interlining that bubbled after the first press
What we specified
| Item | Invisible Zipper |
|---|---|
| Client type | A Footwear Factory |
| Market | Poland |
| Order volume | 50,000 pieces across 6 specifications |
| Base material | Stainless Steel |
| Standard size | 9 mm Width |
| Finish | Rose Gold Plating |
| Sampling rounds | 2 |
| Delivery window | 8 weeks from PO to ex-factory |
| Compliance | GRS |
How it was resolved
- We rebuilt the specification around Stainless Steel and locked the tolerance before bulk.
- The finish was moved to Chrome Plating 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
- 50,000 pieces delivered inside the 8-week window.
- Unit cost held within 3.0% 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
Fix the specification count early. Adding variants after production starts is the most expensive change a client can request.
Planning something similar?
If you are comparing suppliers, send us the spec they quoted against. We will quote the same spec and show you where the difference sits.
