The invention relates to printing
lithography, in particular to a printing lithographic plate (UV-CTP) for
laser digital scanning and the preparation method thereof. The preparation method of the printing lithographic plate (UV-CTP) comprises the following steps: firstly cleaning, neutralizing, electrolyzing and oxidizing aluminum plate strip materials and hole-sealing to obtain the plate base; then, spread-
coating the prepared photosensitive
coating liquid on the plate base through extruding; and obtaining the UV-CTP after
drying. The UV-CTP plate, following the photosensitive CTP plate and the thermosensitive CTP plate, belongs to a novel plate which can be directly imaged through computer digital
laser scanning without pretreatment. Compared with the conventional PS plate and CTP plate, the UV-CTP plate has the following characteristics and advantages that the aluminum plate rolling technique with low deformation rate and low surface defect ensures that the plate base of the plate has better physical properties, particularly, the UV-CTP plate is advantageous in manufacturing cost, preservation period and universality over other CTP plates; and the UV-CTP plate has the characteristics of high dot reducibility, high photosensitive speed, great operating
latitude and wide application, etc., therefore, the UV-CTP plate is applicable to printing materials, such as
metal, plastic, etc., by the UV ink.