Case Study: Custom Open-End Zipper for a Theatre Costume Workshop in New Zealand

Open-End Zipper for a Theatre Costume Workshop in New Zealand

A Theatre Costume Workshop approached us with a open-end zipper requirement for the New Zealand 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

• A trim that passed sampling but failed in-line because it was never cycle tested
• A zipper puller that broke under pull test at the warehouse
• Shrinkage that only showed up after the first wash

What we specified

How it was resolved

1. We rebuilt the specification around Nylon and locked the tolerance before bulk.
2. The finish was moved to Gunmetal Finish after strike-off tests showed better durability.
3. A pre-production sample was approved and retained as the golden reference.
4. Production ran with in-line inspection and a mid-run photo report.
5. Cartons were packed to the client's own barcode and ratio specification.

Result

• 10,000 pieces delivered inside the 10-week window.
• Unit cost held within 1.5% of the original quotation.
• Inspection-related rejection stayed under 1.0%.
• 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?

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.