If a printing plate formation rough surface and the surface or printed editions of acidproof with minor corrosion phenomena exist, should be replaced with the new printing plate.

• 若是印版暗不天磨损酿成不细糙陈迹，或印版因为暗不天耐酸性欠好活命惨轻的腐化本体酿成的，不该调换陈的印版。