Case Study: Custom Invisible Zipper for a Theatre Costume Workshop in Japan
Source:Innovative Award Badges /
Time:2026-09-18
Invisible Zipper for a Theatre Costume Workshop in Japan
A Theatre Costume Workshop approached us with a invisible zipper requirement for the Japan 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
- Lead time quoted without the plating or dyeing sub-process
- MOQ that was quoted per colourway rather than per style
What we specified
| Item | Invisible Zipper |
|---|---|
| Client type | A Theatre Costume Workshop |
| Market | Japan |
| Order volume | 5,000 pieces across 3 specifications |
| Base material | Genuine Leather |
| Standard size | 20 mm Width |
| Finish | Powder Coating |
| Sampling rounds | 4 |
| Delivery window | 5 weeks from PO to ex-factory |
| Compliance | California Prop 65 |
How it was resolved
- We rebuilt the specification around Genuine Leather and locked the tolerance before bulk.
- The finish was moved to Epoxy Doming 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
- 5,000 pieces delivered inside the 5-week window.
- Unit cost held within 4.5% of the original quotation.
- Inspection-related rejection stayed under 2.0%.
- The specification is now on file, so reorders reproduce the approved sample.
What we would repeat
Lock the material standard before sampling. Once the base changes, every downstream approval has to be redone and the calendar slips.
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.
