| abstract |
A toner including: toner base particles; and external additive, the toner base particles each comprising binder resin and colorant, wherein the external additive comprises coalesced particles, the coalesced particles are each a non-spherical secondary particle in which primary particles are coalesced together, and an index of a particle size distribution of the coalesced particles is expressed by Formula (1): n n n n n n n n n n Db n 50 n n n Db n 10 n n n ≦ n 1.20 n n n n n Formula n n n n n n n ( n 1 n ) n n n n n n n n n where, in a distribution diagram where particle diameters in nm of the coalesced particles are on horizontal axis and cumulative percentages in % by number of the coalesced particles are on vertical axis and in which the coalesced particles are accumulated from those having smaller particle diameters to those having larger particle diameters, Db 50 denotes a particle diameter of the coalesced particle at which the cumulative percentage is 50% by number, and Db 10 denotes a particle diameter of the coalesced particle at which the cumulative percentage is 10% by number. |