Patent ID: 9523931
Filing Date: 2016-12-20
CPC Classification: G03G

Claim Text:
1. A toner, comprising: toner base particles; and silica particles comprising first silica particles, and second silica particles, wherein the base particles comprise a crystalline polyester, wherein the first silica particles have an average primary particle diameter of 78 nm to 250 nm, wherein the second silica particles have an average primary particle diameter of 19 nm to 50 nm, wherein a mass ratio of the first silica particles to the base particles is 0.011 to 0.038, wherein a mass ratio of the second silica particles to the base particles is 0.006 to 0.028, wherein a liberation ratio of the silica particles from the toner by an ultrasonic vibration method is 5% by mass to 15% by mass, relative to the total mass of the silica on the toner base particles, and wherein an amount of particles having primary particle diameters of 30 nm or smaller in the silica particles liberated from the toner by the ultrasonic vibration method is 6% by number to 20% by number, relative to the total number of liberated silica particles from the toner.