PURPOSE: To provide the plate by obtaining the decorative material having the patterns consisting of the assembly of intricate and fine concentrical closed curve group regions and rapidly drawing multiple parallel lines by the rugged groove patterns corresponding to the concentrical closed curve groups.

CONSTITUTION: The fine rugged patterns assembled with plural groups of the concentrical closed curve groups are formed on the surface of a base material. The process for production of the plate to be used for working and molding of the rugged patterns has a 1st stage for forming the closed region information to form the closed regions by the prescribed value parts of the measured values of the image information obtd. from an original, a 2nd stage for forming the multiple parallel line information to form the multiple parallel line by framing based on the closed region information, a 3rd stage for forming a film for plate exposing based on the closed region information and the multiple parallel line information, and a 4th stage for inscribing the frame-shaped multiple parallel lines on a metallic or synthetic resin, etc., for the multiple parallel line plate based on this film.