polyesters such as polyethylene terephthalate and the like polyolefins such as polypropylene and the like cellulose derivatives such as cellulose triacetate cellulose diacetate and the like polycarbonate polyvinyl chloride chloride polyimide nonmagnetic metals such as aluminum copper and the like and paper the radiations which can be used for crosslinking and curing the radiation curable coating material of the invention include electron beam u03b3 ray neutron beam u03b2 ray x ray and the like among which electron beam is particularly preferable from the viewpoint of the easiness to control radiation dose and the easiness to introduce the apparatus for projecting the radiation into the production process the electron beams used for crosslinking and curing the coating film are preferably projected so that the dose of electron beam absorbed into the coating comes to 0 5 to 20 megarad by using an electron beam accelerator having an acceleration voltage of 100 to 750 kv preferably 150 to 300 kv from the viewpoint of transmitting power the present invention will be described more in detail below by way of working examples but the invention is not limited to these working examples in the working examples below the molecular weights are those measured by the osmotic pressure method and the structures of compounds are those revealed by infrared spectrometric and nmr spectrometric analyses 1 in a 1 liter flask equipped with a thermometer a stirrer and a reflux condenser there were.