What Causes Wire Marks on Paper?
FAQ
Wire marks on the paper surface — causes ranked by likelihood:
Binder knuckle protrusion — Most common with standard triple-layer fabrics. The binder yarns connecting top and bottom layers protrude into the paper side. Solution: upgrade to SSB (Sheet Support Binder) design.
Fabric tension too low — Increase tension within the 4-8 kN/m range.
Mesh too coarse for the basis weight being produced.
Excessive vacuum — Reduce vacuum levels to the minimum required for adequate drainage.
Stock freeness too high — Adjust refining to reduce freeness.
Diagnostic tip: Map the mark pattern. Regular spacing matching weave pattern = fabric-related issue.
Technical Background
This answer is based on PAPTEX's expertise in Forming Fabric. PAPTEX provides engineered fabric solutions to 200+ paper mills worldwide.
Related Resources
- 📖 View our Product Knowledge for more information
- 📋 Browse Forming Fabric related articles
- 📞 Contact PAPTEX Engineers for personalized recommendations for your paper machine
Last updated: July 2026
Related Articles
How to Choose the Right Forming Fabric
A comprehensive guide to selecting forming fabrics based on paper grade and machine speed.
How to Extend Paper Machine Clothing Service Life
Understand the key factors affecting fabric life and discover practical tips for extending replacement intervals.
Top 5 Tips for Paper Mill Managers Selecting PMC Fabrics
Five practical checks for selecting paper machine clothing from machine position, furnish, operating data, baseline performance and measured total cost.