1. High sensitivity,good developing latitude and good water receptivity. 2. Multiple graining layer with fine structure, high resolution and good tone reproduction. 3. Oxidation layer ensuring good water retaining and long press life. 4. Gas leading layer reducing the time required for evacuation and preventing the formation of an indistinct image during printing. Production Craft: Electrolytic process ensures that the graining cells of the plate are well distributed,the ballace of water- ink reached rapidly and maintained in the printing . Oxidation process makes the aluinum substrate hard and durable, which is greatly improve water retaining and durability of the plate.