Abstract: An electrodeposition dispersion for electrodepositing an electrodeposition film onto a substrate having conductive properties by anionic electrodeposition, the electrodeposition dispersion contains: water; an organic solvent; a solid component; and a neutralizing agent; and an organic acid, in which the solid component includes at least a polyimide resin. An insulating film production method for forming an insulating film on a surface of a substrate, the method includes: an electrodeposition film forming step (S02) of forming an electrodeposition film on the substrate by immersing the substrate and a counter-electrode in the electrodeposition dispersion described above, and applying, with the substrate as an anode and the counter-electrode as a cathode, a voltage between the anode and the cathode; and a baking step (S03) of baking the electrodeposition film.

Abstract: A method for managing an electrodeposition dispersion is used in a case where an electrodeposition film is formed on a substrate having conductive properties by anionic electrodeposition, and the method includes: adjusting a concentration of an organic acid contained in the electrodeposition dispersion by subjecting the electrodeposition dispersion to an anion exchange treatment. An electrodeposition device is used in a case where an electrodeposition film is formed on a substrate having conductive properties by anionic electrodeposition, and the electrodeposition device includes: an electrodeposition tank in which an electrodeposition dispersion is stored and a substrate and a counter-electrode are immersed; an anion exchange means for subjecting the electrodeposition dispersion to an anion exchange treatment; and an electrodeposition dispersion circulation means for circulating the electrodeposition dispersion between the electrodeposition tank and the anion exchange means.