Patent ID: 8075955

Claim:
A method for making a positive photosensitive planographic printing plate comprising a base having formed thereon in this order an undercoat layer and an image recording layer, wherein the undercoat layer is obtained by applying an undercoat layer solution containing a solvent and an acrylic resin having an alkali-soluble group, followed by drying the coating, the image recording layer comprises a novolac resin and an infrared absorbing agent, and the applied undercoat layer solution is dried in an undercoat layer drying step which comprises a first drying step, a subsequent steam-containing hot air drying step using steam-containing hot air having a temperature of 90° C. to 200° C., and a relative humidity of 8% to 70%, and a second drying step following the steam-containing hot air drying step, wherein, in the first drying step, the applied undercoat layer solution is dried in a lower humidity than that in the steam-containing hot air drying step until the undercoat layer reaches a dry point, and the second drying step uses dry hot air having a relative humidity of about 0% to 2%.