Selecting the correct machine depends heavily on the material's physical properties. For flexible packaging and plastic films (BOPP, PET, PVC), prioritize machines with razor blade cutting systems and automatic tension control to prevent stretching. For paper or non-woven fabrics, a shear knife system is essential for clean edges. Always verify the maximum unwind and rewind diameters and ensure the slitting precision meets your requirements, typically within ±0.1mm to ±0.5mm for high-end applications.