| abstract |
(57) [Abstract] [Purpose] To provide a recording ink having excellent stability over time and excellent print quality. [Structure] A recording ink having a viscosity of 2 to 3 cps was prepared by mixing a solvent mainly containing water, a pigment as a colorant, a dispersant, and a resin, and mixing the mixture with a bead mill. The recording ink in which the average particle diameter of the dispersed pigment is 0.05 to 0.1 μm and almost all particle diameters of the pigment are distributed in the range of 0.01 to 0.3 μm The print quality was excellent, there was no ink bleeding, and the print density was good. |