The price of UV printing ink is primarily driven by its chemical composition and performance metrics. Key factors include pigment concentration (higher loads offer better color saturation), viscosity levels (must match specific printhead requirements like Epson, Ricoh, or Kyocera), and curing speed. High-quality inks feature nanoscale filtration (<0.2 microns) to prevent nozzle clogging and ensure superior adhesion on diverse substrates like glass, metal, or acrylic. Always verify the shelf life, which typically ranges from 6 to 12 months depending on the color (white ink usually has a shorter lifespan).