Case Study: Custom Knit Interlining for a Denim Manufacturer in China
Source:Carved Bone Inlay Box /
Time:2026-09-18
Knit Interlining for a Denim Manufacturer in China
A Denim Manufacturer approached us with a knit interlining requirement for the China 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
- Elastic that lost recovery after three washes
- Shade drift between the approved lab dip and the bulk lot
- A zipper puller that broke under pull test at the warehouse
What we specified
| Item | Knit Interlining |
|---|---|
| Client type | A Denim Manufacturer |
| Market | China |
| Order volume | 20,000 pieces across 4 specifications |
| Base material | Aluminium |
| Standard size | 10# Gauge |
| Finish | Laser Engraved Finish |
| Sampling rounds | 2 |
| Delivery window | 10 weeks from PO to ex-factory |
| Compliance | AATCC Test Methods |
How it was resolved
- We rebuilt the specification around Aluminium and locked the tolerance before bulk.
- The finish was moved to Anodised Finish 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
- 20,000 pieces delivered inside the 10-week window.
- Unit cost held within 1.5% 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?
Share the programme details and we will propose two alternatives — one optimised for unit cost, one for lead time — and let you choose.
