Patent ID: 10465084

Abstract:
Provided are an inkjet ink set for corrugated cardboard, the inkjet ink set including inks of five colors, including a cyan ink, a magenta ink, a yellow ink, a black ink, and an α ink, in which in a case where images having a halftone dot area ratio of 100% are formed on a corrugated cardboard base material using the five color inks each separately, the hue angle h, the chroma saturation C*, and the lightness L* of the formed images in the CIE 1976 L*a*b* color space satisfy the relations of the following Formula 1 to the following Formula 3; and an image forming method. In Formula 1, hM, hα, and hY represent the respective hue angles h of the inks. In Formula 2, C*M, C*α, and C*Y represent the respective chroma saturations C* of the inks. In Formula 3, L*M and L*α represent the respective lightness L* of the inks. hM<hα<hY  Formula 1C*M<C*α<C*Y  Formula 2L*M<L*α  Formula 3.