Case Study: Custom Zipper Slider for a Promotional Product Agency in South Korea

Zipper Slider for a Promotional Product Agency in South Korea

A Promotional Product Agency approached us with a zipper slider requirement for the South Korea 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 zipper puller that broke under pull test at the warehouse
• A trim that passed sampling but failed in-line because it was never cycle tested
• 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 Glossy Enamel 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

• 100,000 pieces delivered inside the 4-week window.
• Unit cost held within 1.5% 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.