Patent ID: 7189766

Claim:
A printing ink, consisting essentially of: a photo-curable high polymer precursor, a photopolymerization initiator, and inorganic fine particles, wherein at 25° C., the viscosity at a shear rate of 5 (l/s) is 8 to 75 (Pa·s), the viscosity at a shear rate of 20 (l/s) is 3 to 25 (Pa·s), and the thixotropic index value is 1.5 to 3.5, the inorganic fine particles are contained at 3 to 8 parts by weight relative to 100 parts by weight of the high polymer precursor and are dispersed in the form of a colloid, and the mean particle size of the inorganic fine particles is 0.1 μm or less.