PURPOSE: To obtain a brailled sheet resistant to damage, such as abrasion and crushing, by exposing a photosensitive resin layer through a Braille pattern and developing it.

CONSTITUTION: A 100μm thick negative is placed, for example, on the first transparent glass plate, and covered with a 20μm thick polypropylene cover film. A photosensitive resin is coated on this film in about 0.55mm thickness, a polyyester film coated with a polyester type primer is closely attached to this layer so that this primer touches the photosensitive layer. Further, on this polyester film, the second transparent glass plate is placed, and this laminate is exposed to a superhigh-pressure mercury lamp from the side of the second glass for about 30sec corresponding to about 600mJ, and then it is exposed to the same light source from the first glass plate side for about 50sec. After the exposures, the cover film is stripped, the resin layer on the polyester film is processed with an aq. soln. of sodium borate to remove the unhardened resin, and the whole layer, after drying, is exposed to said source for about 50sec to harden it perfectly, thus permitting a brailled sheet of high in resistance to moisture and abrasion to be obtained.