Patent ID: 7926930

Claim:
An inkjet ink comprising a polyamic acid (A) having structural units expressed by Formula (1): wherein R 1 and R 2 are each independently a C 2 to C 100 organic group; and having at least one molecular terminal group selected from the group of molecular terminal groups expressed by Formulas (21) and (22): wherein R 3 and R 4 are each independently a C 2 to C 100 organic group; and a solvent (B), wherein the inkjet ink comprises 20 to 60 weight parts of the polyamic acid (A) per 100 weight parts ink jet ink, and the viscosity of the ink is 1 to 50 mPa·S at 25° C., and the polyamic acid (A) has a weight average molecular weight of 1,000 to 4,500.