AMORPHOUS POLYESTER RESIN, POLYESTER WATER DISPERSION, METHOD OF MANUFACTURING POLYESTER WATER DISPERSION, RESIN PARTICLES, METHOD OF MANUFACTURING RESIN PARTICLES, TONER RESIN PARTICLES, TONER, DEVELOPER, TONER STORAGE UNIT, AND IMAGE FORMING APPARATUS
AMORPHOUS POLYESTER RESIN, POLYESTER WATER DISPERSION, METHOD OF MANUFACTURING POLYESTER WATER DISPERSION, RESIN PARTICLES, METHOD OF MANUFACTURING RESIN PARTICLES, TONER RESIN PARTICLES, TONER, DEVELOPER, TONER STORAGE UNIT, AND IMAGE FORMING APPARATUS
An amorphous polyester resin is provided that includes a polycondensation product of an alcohol component and a carboxylic acid component. The alcohol component includes at least one selected from the group consisting of plant-derived 1,3-propanediol, plant-derived 1,3-butanediol, and plant-derived ethylene glycol, and the carboxylic acid component includes a polycarboxylic acid having a sulfo group. A ratio (OHVa/AVa) of a hydroxyl value (OHVa) of the amorphous polyester resin with respect to an acid value (AVa) of the amorphous polyester resin is from 1.1 to 1.5.