Case Study: Custom Closed-End Zipper for a Denim Manufacturer in Hong Kong

Closed-End Zipper for a Denim Manufacturer in Hong Kong

A Denim Manufacturer approached us with a closed-end zipper requirement for the Hong Kong 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 compliance document that arrived after the goods were already shipped
• Reorders that quietly changed supplier and changed the hand feel
• A spec that lived in an email instead of a tech pack

What we specified

How it was resolved

1. We rebuilt the specification around Glass and locked the tolerance before bulk.
2. The finish was moved to Pearlescent Coating 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

• 2,000 pieces delivered inside the 4-week window.
• Unit cost held within 2.0% 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

Lock the material standard before sampling. Once the base changes, every downstream approval has to be redone and the calendar slips.

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.