Decolorizable toner
Provided is a decolorizable toner including a binder resin and colorant particles which contain a color developable compound, a color developing agent, and a decolorizing agent, and have a capsule structure coated with an outer shell, wherein the binder resin is contained in an amount of 60 to 80% by mass with respect to the total amount of the toner components.
1. A method for producing an electrophotographic toner comprising:
mixing a dispersion of colorant particles comprising a colorant and a dispersion of release agent particles consisting essentially of a release agent and having a volume average particle diameter smaller than that of the colorant particles;
aggregating the colorant particles and the release agent particles in the dispersion of the colorant particles and the release agent particles to produce first aggregates;
mixing the dispersion comprising the first aggregates and a dispersion of resin particles consisting essentially of a binder resin and having a volume average particle diameter smaller than that of the colorant particles; and
aggregating the first aggregates and the resin particles in the dispersion of the first aggregates and the resin particles to produce second aggregates,
wherein the release agent particles are disposed outside the colorant particles in each of the first aggregates,
a surface of the first aggregates is coated by the resin particles in each of the second aggregates, and
the binder resin is contained in an amount of 60 to 80% by mass with respect to the total amount of the colorant particles, the release agent particles and the binder resin.
2. The method according to claim 1 , wherein the colorant particles comprise a color developable compound, a color developer and a decolorizing agent having an action of decolorizing by reducing an interaction between the color developable compound and the color developer and have a capsule structure coated with an outer shell.
3. The method according to claim 1 , wherein the release agent is wax.
4. The method according to claim 1 , wherein the colorant particles in the dispersion of colorant particles have a volume average particle diameter of 0.5 μm to 7 μm.
5. The method according to claim 1 , wherein the colorant particles in the dispersion of colorant particles have a volume average particle diameter of 0.7 μm to 5 μm.
6. The method according to claim 1 , wherein the resin particles in the dispersion of resin particles have a volume average particle diameter of 0.01 μm to 1.0 μm.
7. The method according to claim 1 , wherein the resin particles in the dispersion of resin particles have a volume average particle diameter of 0.05 μm to 0.2 μm.
8. The method according to claim 1 , wherein the colorant particles are contained in an amount of 10% by mass or more with respect to the total amount of the colorant particles, the release agent particles and the binder resin.
9. The method according to claim 1 , wherein the colorant particles are contained in an amount of 15% by mass or more with respect to the total amount of the colorant particles, the release agent particles and the binder resin.
10. The method according to claim 1 , wherein the release agent particles are contained in an amount of 10% by mass or more with respect to the total amount of the colorant particles, the release agent particles and the binder resin.
11. The method according to claim 1 , wherein the binder resin is contained in an amount of 60 to 70% by mass with respect to the total amount of the colorant particles, the release agent particles and the binder resin.
12. The method according to claim 1 , wherein the binder resin has a glass transition temperature of 54° C. to 70° C.