Abstract: Method of fixing toner by applying a fixing agent to a substrate containing an unfused toner at predetermined positions thereof, by spraying or dripping the fixing agent onto the substrate, or immersing the back surface of the substrate into the fixing agent to permit the fixing agent to permeate into the other side of the substrate containing the toner. The fixing agent causes the unfused toner to be half-dissolved or swollen on the surface of the object and the half-dissolved or swollen toner is dried to be fixed to the substrate.