1) Brightness: 92±1%, comfortable-looking2) Transparency: ≥81%, even structure, lighttight3) Content of water: 4.5 - 5.5%, very low content of water4) PH value: 6.8 - 7.6, neutral Paper5) Aperture gap: ±0.1mm, low error, fit for fast printing6) Color-developing sensitivity: 88.6,...