Patent ID: 8291820

Claim:
A production method for an intaglio printing plate, comprising: forming a photosensitive resin film on a substrate; subjecting the photosensitive resin film to pattern exposure so as to form a plurality of concave patterns each having a depth on the photosensitive resin film; and developing the photosensitive resin film under a condition where the concave patterns have depths that increase as aperture widths increase; wherein the photosensitive resin film is developed under a condition where a depth d 1 of the concave pattern having the largest aperture width W 1 , of the concave patterns, satisfies the following expression: d 1>( A×ρ×W 1 4 )+( t×ρ/E ) where ρ represents the pressure applied to a blanket having an ink layer when pressing the blanket against a surface of the intaglio printing plate having the concave patterns, E represents the Young's modulus of the blanket, t represents the thickness of the blanket, and A is a constant of the blanket; and calculating the constant A by a preliminary experiment before the step of forming the photosensitive resin film.