Case Study: Custom Core Spun Thread for a Car Interior Supplier in Czechia

Core Spun Thread for a Car Interior Supplier in Czechia

A Car Interior Supplier approached us with a core spun thread requirement for the Czechia 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

• Shrinkage that only showed up after the first wash
• A compliance document that arrived after the goods were already shipped
• A trim that passed sampling but failed in-line because it was never cycle tested

What we specified

How it was resolved

1. We rebuilt the specification around Brass and locked the tolerance before bulk.
2. The finish was moved to Sandblasted 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

• 5,000 pieces delivered inside the 8-week window.
• Unit cost held within 2.0% 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

Keep one accountable owner on both sides. Most delays come from hand-offs, not from machines.

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.