PURPOSE: To improve drop-out quality and to reduce man-hour at the same instant by making it possible to perform simultaneously surface roughening, cleaning and binder coating.

CONSTITUTION: A resin base material 1 consisting of an acrylic resin is dipped in a vessel 8 in which toluene 7 is filled to generate a micro rugged forming region on the surface of the material 1. A denatured layer 9 where the uniform rugged forming region is generated over the entire outside surface is finally formed. If replication is performed by using such resin base material 1, the adhesive strength equivalent to the adhesive strength of the conventional medium subjected to surface roughening and binder coating is obtd. and an additive layer 3 consisting of a photosetting resin after curing is easily separated from a metallic stamper 5. The microruggedness forming region contacts with the additive layer 3 consisting of the photosetting resin and therefore no influence is optically given to the focus and route of a laser beam as far as the photosetting resin having the refractive index equivalent to the refractive index of the base material is used.