| abstract |
It is an object of the present invention to provide a polyimine-based varnish which can form a film having a good appearance and good flexibility, and a polyimine-based varnish containing a polyimine-based polymer, a solvent and water. In the polyimine-based polymer, when the film having a thickness of 50 μm is formed from the polyimide-based polymer, the total light transmittance of the film is 85% or more, and the yellowness is 5 or less; The polyimine-based polymer can be dissolved; the water content is from 0.60 to 4.5% by mass based on the total mass of the polyimine-based varnish. |