Patent ID: 11964495
Assignee: RICOH COMPANY, LTD.
Field: Textile and paper machines (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 22:
23. A printing method comprising:
controlling an ink set and nozzle lines of an ink discharging unit in a manner that an auxiliary layer, which is a layer auxiliarily formed by discharging a liquid having a color different from process colors, can he deposited as any one selected from the group consisting of a preprint a post-print, and an intermediate print with respect to an image layer, which is a layer of an image formed by discharging inks having the process colors for image formation,
wherein the ink set contains an ink including a cyan pigment, an ink including a magenta pigment, an ink including a yellow pigment, and an ink including a black pigment,
wherein a proportion of the cyan pigment is 0.70% by mass or greater but 1.40% by mass or less,
wherein a proportion of the magenta pigment and a proportion of the yellow pigment are both higher than the proportion of the cyan pigment, and
wherein the formulae (1) and (2) below are satisfied,

proportion of black pigment>proportion of yellow pigment>proportion of cyan pigment  formula (1);

proportion of magenta pigment>proportion of yellow pigment>proportion of cyan pigment  formula (2).