Patent ID: 8905339

Claim:
A liquid developer-preparing apparatus preparing a liquid developer obtained by dispersing toner particles in a liquid, the apparatus comprising: a tank that stores a first dispersion including a liquid and toner particles; a pulverizing device that pulverizes the toner particles in the first dispersion sent from the tank; a liquid-sending route in which the first dispersion circulates between the tank and the pulverizing device; a liquid-sending device that is provided to the liquid-sending route and sends the first dispersion; a pressure gauge that is provided to the liquid-sending route and measures a liquid-sending pressure of the first dispersion; and a determination device that determines whether or not the toner particles in the first dispersion have been pulverized to a target volume average particle size, by comparing the liquid-sending pressure measured by the pressure gauge with a liquid-sending pressure obtained when the toner particles have the target volume average particle size, which is a pressure measured in advance using a second dispersion having the same composition as that of the first dispersion.