Display panel, to processes for its preparation and composition of ink which is used by the process for its preparation

A display panel having a resin substrate and an electrode formed on at least a portion of the resin substrate by inkjet printing printed layer. The printed layer is formed of UV-curing inks of cured products each containing UV-curable monomers, which are polymerized by UV irradiation and cured, and the printed layer has at least two such cured products having different pencil hardness values.