| 摘要 |
Printing plates (2) are formed from a layer of photo polymerizable resin (R) by a process and assembly which includes a back masking negative (38) placed between light sources (42) and a support plate (28) on the non-printing side of the resin layer. A connective substrate (4) is positioned between the bac k mask negative and the resin layer. A negative (44) of the image or images to be formed on the printing plate is positioned on the side of the resin layer which is to form the printing surface (10) of the plate. Both sides of the resin layer are exposed to UV light, and the back mask negative serves to allow hardening of the resin only in the areas of the resin layer where printing surfaces are located. Thus, a plurality of isolated printing surfac es may be formed on the plate, which printing surfaces are connected together b y the connective substrate. In this manner, a photo polymerized floor need not be produced on the printing plates, allowing increased resin recovery after the plate has been formed. |
