When sourcing a used facial tissue machine, you must prioritize the folding type (e.g., V-fold, Z-fold, or Interfold) to ensure it matches your market demand. Check the effective machine width (typically 1500mm–3000mm) and the production speed, which for used equipment should ideally maintain 80-120 meters/minute or 800-1000 sheets/minute/line. Additionally, verify the embossing unit type (steel-to-steel or steel-to-rubber) and ensure the PLC control system (e.g., Siemens or Mitsubishi) is functional and not obsolete, as this affects future maintenance.