The object is to provide a
polyimide ink composition having good printing properties and good continuous printing properties, which composition can be dried at a low temperature of not higher than 220° C., and which composition gives a
coating film, after being dried, having excellent dimensional stability,
heat resistance,
low modulus of elasticity, flexibility, resistance to warping,
chemical resistance, adhesiveness with substrates, and plating resistance. This object is accomplished by a
polyimide ink composition for printing, comprising a mixed
solvent containing an
benzoic acid ester
solvent and a glyme
solvent, and a
polyimide soluble in the mixed solvent; wherein the polyimide is obtained by polycondensing a polyimide
oligomer with a tetracarboxylic dianhydride component(s) and / or a
diamine component(s) having no
siloxane bond in molecular skeleton thereof the polyimide
oligomer being prepared by polycondensing a tetracarboxylic dianhydride component(s) and a
diamine component(s) having
siloxane bonds in molecular skeleton thereof in the presence of a base catalyst(s), or a mixed catalyst including a
lactone(s) and / or an acidic compound(s) and a base(s); the content of the
diamine component(s) having
siloxane bonds based on the total diamine components being 15 to 85% by weight.