JP2009300906A5 - - Google Patents

Claims (6)

In a toner having toner particles containing at least a binder resin, a colorant, and a release agent, and at least a fatty acid metal salt,
The toner has a number average particle diameter (D1) of Dt (μm), the number of particles having a particle diameter of 2/3 or less of Dt in the toner particles is P (number%), and is based on the volume basis of the fatty acid metal salt. A toner satisfying the following formulas (1) to (5), where Ds is a median diameter (D50), and V (mass%) is an addition amount of the fatty acid metal salt to the toner.
4.0 ≦ Dt ≦ 8.5 (1)
0.10 ≦ Ds ≦ 0.65 (2)
5.0 ≦ P ≦ 25.0 (3)
8.0 ≦ Dt / Ds ≦ 40.0 (4)
0.0005 ≦ V / P ≦ 0.0500 (5)   The toner according to claim 1, wherein the Dt is 4.5 μm or more and 7.0 μm or less. The toner according to claim 1, wherein a ratio V / P of V and P satisfies the following formula (4).
0.0025 ≦ V / P ≦ 0.0250 (6)   The toner according to any one of claims 1 to 3, wherein the toner further contains a polymer or copolymer having a sulfonic acid group, a sulfonic acid group, or a sulfonic acid ester group. The toner according to the fatty acid metal salt, any one of claims 1 to 4, wherein the carbon number of 12 to 22 of a metal salt of a fatty acid. Wherein the fatty acid metal salt, the toner according to any one of claims 1 to 5, characterized in that zinc stearate or calcium stearate.