Patent ID: 7439281

Claim:
A UV curing type liquid ink precursor comprising: a pigment dispersion which comprises a resin-coated pigment comprising a resin and a pigment, and having an average particle diameter of 250 nm or less; and a dispersion medium having a viscosity of 30 mPa.s or less at a temperature of 25° C. and a boiling point of 150° C. or more at 1 atm, the dispersion medium containing as a major component a cation polymeric compound and containing at least one selected from the group consisting of limonene diepoxide, neopentyl glycol diglycidyl ether, di[1-ethyl(3-oxetanyl)]methyl ether and cyclohexane vinyl ether; and a photo-acid generating agent; wherein a mixing ratio of the pigment is confined within the range of 3 to 41% by weight based on a total weight of the dispersion medium, and a ratio of the resin in the resin-coated pigment is confined within the range of 5 to 37% by weight based on the weight of the pigment.