Singeing and Surface Preparation

Singeing burns protruding fiber ends from fabric surface using open gas flames (natural gas, propane 1000-1200°C) or heated plates (800-1000°C) creating smooth, uniform surface, preventing pilling, improving luster and printing clarity. Process: fabric passes rapidly (100-250 m/min) through flame zone (contact time 0.05-0.15 seconds), protruding fibers burn (cellulose ignition 350-400°C) while main fabric protected by its mass and rapid passage, immediate quenching in water bath preventing afterglow and fabric damage. Machine types: gas singeing (most common—direct flame, highest efficiency, requires safety controls preventing flashback), plate singeing (heated copper plates, safer for synthetics prone to melting), and roller singeing (rotating heated roller). Parameters: flame temperature, fabric speed, distance from flame (5-15 mm optimal—too close damages fabric, too far incomplete singeing), and fabric tension. Effects: removes fiber ends improving smoothness (reducing Martindale pilling formation 30-50%), enhances print definition (preventing bleeding), improves luster (smoother surface), and reduces dust/fly. Fiber-specific: cotton/cellulosics universal application, synthetics requiring careful control (PE/PP melt 120-170°C risk), wool/silk rarely singed (protein damage, aesthetic loss). Post-singeing: desizing and scouring remove char and ashes preventing contamination in subsequent processes.