Oil-based inkjet ink set and method for producing printed item

A method for producing a printed item, comprising discharging two or more inks onto a recording medium to form an image, wherein

• the two or more inks comprise:
• an oil-based inkjet ink A, which is a black ink and comprises a pigment, a pigment dispersant and a non-aqueous solvent, the non-aqueous solvent of the oil-based inkjet ink A containing at least 15% by mass of a silicone oil relative to a total mass of the non-aqueous solvent of the oil-based inkjet ink A, and
• an oil-based inkjet ink B, which is a color ink and comprises a pigment, a pigment dispersant and a non-aqueous solvent, the non-aqueous solvent of the oil-based inkjet ink B containing at least 50% by mass of a petroleum-based hydrocarbon solvent relative to a total mass of the non-aqueous solvent of the oil-based inkjet ink B.

A method for producing a printed item, comprising, using an inkjet head having a first nozzle portion and a second nozzle portion, discharging an oil-based inkjet ink A from the first nozzle portion and discharging an oil-based inkjet ink B from the second nozzle portion to form an image on a recording medium, wherein

• the oil-based inkjet ink A comprises a non-aqueous solvent, and the non-aqueous solvent of the oil-based inkjet ink A contains at least 15% by mass of a silicone oil relative to a total mass of the non-aqueous solvent of the oil-based inkjet ink A, and
• the oil-based inkjet ink B comprises a non-aqueous solvent, and the non-aqueous solvent of the oil-based inkjet ink B contains at least 50% by mass of a petroleum-based hydrocarbon solvent relative to a total mass of the non-aqueous solvent of the oil-based inkjet ink B.