Patent ID: 8585197

Claim:
A method for printing a non-aqueous ink onto a printing substrate, using a non-aqueous ink comprising a coloring material and a non-aqueous solvent, wherein the non-aqueous ink has a total surface free energy, calculated from a Kaelble-Uy theoretical formula, of 25 to 30 mN/m, and a dispersive component ratio represented by a formula (1) shown below of 0.55 to 0.75, and the printing substrate has a coating layer comprising inorganic particles, has a total surface free energy, calculated from a Kaelble-Uy theoretical formula, of 30 to 50 mN/m, has a dispersive component ratio represented by the formula (1) of 0.80 to 1.0, and exhibits a liquid absorption property for the inorganic particles, represented by a formula (2) shown below, of 0.30 or greater: Dispersive component ratio γ dr=γd/γ Formula (1) γdr: dispersive component ratio γd: surface free energy of dispersive component γ: total surface free energy Liquid absorption property of inorganic particles: A=B/C Formula (2) A: liquid absorption property of inorganic particles B: oil absorption of inorganic particles (ml/100 g) C: specific surface area of inorganic particles (m 2 /g) wherein the oil absorption represented by B refers to a value obtained in accordance with a linseed oil absorption measurement method prescribed in JIS K5101-21, and the specific surface area represented by C refers to a value obtained by a method of measuring specific surface area using a BET method.