Toner for electrostatic image development, full-color toner kit and image forming method
View Patent ↗An electrophotographic toner for electrostatic image development which is capable of obtaining a high chroma full-color image exhibiting clear color without color contamination and excellent light stability is disclosed, comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Blue 76. There are also disclosed a full-color toner kit and an image forming method by use of the toner.
1. An electrophotographic toner comprising a resin and a colorant, wherein the colorant comprises a pigment of C.I. Pigment Blue 76.
2. The toner of claim 1 , wherein the pigment of C.I. Pigment Blue 76 is contained in an amount of from 1 to 10% by mass of the toner.
3. The toner of claim 1 , wherein the pigment of C.I. Pigment Blue 76 is contained in the form of particles having a number average primary particle size of from 10 to 300 nm.
4. The toner of claim 1 , wherein the colorant further comprises a cyan pigment in an amount of less than 50% by mass of the pigment of C.I. Pigment Blue 76.
5. The toner of claim 1 , wherein the colorant is contained in an amount of from 1 to 10% by mass of the toner.
6. The toner of claim 1 , wherein the toner comprises toner particles having a volume-based median diameter of from 3 to 8 μm.
7. The toner of claim 1 , wherein the toner comprises toner particles having a coefficient of variation of volume-based particle size distribution of from 2 to 21%.
8. The toner of claim 1 , wherein the toner exhibits a softening point of from 70 to 110° C.
9. The toner of claim 1 , wherein the resin comprises a polymer formed of at least a monomer having at least one selected from the group of a carboxyl group, a sulfonic acid group and a phosphoric acid group.
10. An electrophotographic toner comprising a resin and a colorant, wherein the colorant comprises a pigment represented by the formula:
wherein n is 10.
11. A full-color toner kit comprising a yellow toner comprising a yellow colorant and a binder, a magenta toner comprising a magenta colorant and a binder, a cyan toner comprising a cyan colorant and a binder and a black toner comprising a black colorant and a binder, wherein the cyan colorant comprises a pigment of C.I. Pigment Blue 76.
12. An image forming method comprising performing image formation by using at least four toners comprised of a yellow toner comprising a yellow colorant and a resins a magenta toner comprising a magenta colorant and a resin, a cyan toner comprising a cyan colorant and a resin and a black toner comprising a black colorant and a resin, wherein the cyan colorant comprises a pigment of C.I. Pigment Blue 76.