Patent ID: 7862861

Claim:
A method of manufacturing an information recording material having a coating step of forming multi-layer coats, of which at least one out of a plurality of layers formed by simultaneous multi-layer application of a plurality of coating liquids over a running supporting base is an information recording layer, and a drying step of drying the multi-layer coats formed at the coating step, the method of manufacturing an information recording material being wherein: at least one coating liquid out of the plurality of coating liquids contains a plurality of components which, when brought into contact or are mixed with each other, make the coating liquids increase in viscosity, the viscosity increase by the plurality of components is a film hardening reaction by polyvinyl alcohol (PVA) and boric acid, and the pH of coating liquids containing the polyvinyl alcohol (PVA) and the boric acid is 6.5 or less and the pH of the coating liquids of any layer adjacent to any layer formed of these coating liquids is 7 or more.