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Negative Working Plate
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A classification of plate used for CTP systems in which the exposed areas of the plate become the image areas after the plate is digitally imaged with lasers. When a negative working plate is exposed, the areas of the emulsion exposed by the lasers are the areas that attract the ink during the printing process and the unexposed areas become the non-image areas, which attract moisture (printing press fountain solution) and prevent the non-image area from attracting ink.
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