Case Study: Custom Two-Way Separating Zipper for a Bag and Luggage Maker in Hong Kong
Source:Crystal Hair Pin Sets /
Time:2026-09-18
Two-Way Separating Zipper for a Bag and Luggage Maker in Hong Kong
A Bag and Luggage Maker approached us with a two-way separating 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 trim that passed sampling but failed in-line because it was never cycle tested
- Reorders that quietly changed supplier and changed the hand feel
- An interlining that bubbled after the first press
What we specified
| Item | Two-Way Separating Zipper |
|---|---|
| Client type | A Bag and Luggage Maker |
| Market | Hong Kong |
| Order volume | 2,000 pieces across 3 specifications |
| Base material | Recycled PET |
| Standard size | 15 mm Width |
| Finish | Matte Black Coating |
| Sampling rounds | 3 |
| Delivery window | 4 weeks from PO to ex-factory |
| Compliance | ISO 12947 Abrasion Resistance |
How it was resolved
- We rebuilt the specification around Recycled PET and locked the tolerance before bulk.
- The finish was moved to Antique Brass 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
- 2,000 pieces delivered inside the 4-week window.
- Unit cost held within 4.5% 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
Approve a pre-production sample made from the actual bulk base material. Substitute material behaves differently in finishing.
Planning something similar?
Tell us the item, the quantity and the delivery window. We will quote it with the sub-processes named, so the lead time you approve is the lead time you get.
