Stitching wires
Pure copper stitching wire
Pure copper stitching wire is made from solid electrolytic copper. Like brass, it cannot rust because it contains no iron. Over time it darkens to a natural patina, which stays on the surface and does not stain the carton. It costs about the same as brass.
| Property | Value |
|---|---|
| Base metal | Electrolytic copper, solid |
| Coating | None required |
| Coating weight | Not applicable |
| Tensile strength | 380 to 520 N/mm² |
| Density | 8.90 g/cm³ |
| Flat sections | 22 to 26 gauge |
| Thickness tolerance | ± 0.02 mm |
| Width tolerance | ± 0.05 mm |
| Finish | Rich red |
| Corrosion life | Immune, patinates cosmetically but cannot rust |
| Relative cost / kg | 7.8× |
| Spools | 2, 5, 15 kg |
| Packing | Shrink wrapped and palletised |
Applications
Where it is used
It is softer than brass or steel, so it gives a gentle clinch. This helps on thick multiwall board and on older machines with worn parts.
Used for
Multiwall board
Premium binding
Older stitching heads
Heavy multiwall corrugated board, premium binding and printed work, humid storage, and older stitching machines that clinch harder grades unevenly.
