JP2007108466A5

JP2007108466A5 -

Info

Publication number: JP2007108466A5
Application number: JP2005299822A
Authority: JP
Filing date: 2005-10-14
Publication date: 2008-11-20

Claims

In an image forming method using an image forming apparatus having an intermediate transfer member and cyan toner a and cyan toner b used for full color image formation,
The cyan toner a contains at least a binder resin, a colorant, and a wax, and has a lightness L ^* (a) of 45 or more in a powder state.
The cyan toner b contains at least a binder resin, a colorant, and a wax, and the lightness L ^* (b) in the powder state is lower than the lightness L ^* (a) of the cyan toner a.
When the maximum displacement amounts of the cyan toner a and cyan toner b with respect to the load of 9.8 × 10 ⁻⁵ N are Sa and Sb, respectively, and the plastic displacement amounts are Ia and Ib, respectively, Ea = (Sa−Ia) × 100 / Sa
Eb = (Sb−Ib) × 100 / Sb
The elastic deformation ratios Ea and Eb represented by 0% ≦ | Ea−Eb | ≦ 10%
An image forming method characterized by satisfying the above.

Elastic deformation rate when said those deformed by the load 9.8 × 10 ^-5 N Cyan Toner a and the cyan toner b, a load is applied in the further ^{9.8 × 10 -5 N (Ea2)} , ( 2. The image forming method according to claim 1, wherein Eb2) is 55% or more.

In an image forming apparatus having an intermediate transfer member and an image forming apparatus using cyan toner a and cyan toner b used for full-color image formation,
The cyan toner a contains at least a binder resin, a colorant, and a wax, and has a lightness L ^* (a) of 45 or more in a powder state.
The cyan toner b contains at least a binder resin, a colorant, and a wax, and the lightness L ^* (b) in the powder state is lower than the lightness L ^* (a) of the cyan toner a.
When the maximum displacement amounts of the cyan toner a and cyan toner b with respect to the load of 9.8 × 10 ⁻⁵ N are Sa and Sb, respectively, and the plastic displacement amounts are Ia and Ib, respectively, Ea = (Sa−Ia) × 100 / Sa
Eb = (Sb−Ib) × 100 / Sb
The elastic deformation ratios Ea and Eb represented by 0% ≦ | Ea−Eb | ≦ 10%
An image forming apparatus characterized by satisfying the above.

In a cyan toner set used for full-color image formation and containing cyan toner a and cyan toner b,
The cyan toner a contains at least a binder resin, a colorant, and a wax, and has a lightness L ^* (a) of 45 or more in a powder state.
The cyan toner b contains at least a binder resin, a colorant, and a wax, and the lightness L ^* (b) in the powder state is lower than the lightness L ^* (a) of the cyan toner a.
When the maximum displacement amounts of the cyan toner a and cyan toner b with respect to the load of 9.8 × 10 ⁻⁵ N are Sa and Sb, respectively, and the plastic displacement amounts are Ia and Ib, respectively, Ea = (Sa−Ia) × 100 / Sa
Eb = (Sb−Ib) × 100 / Sb
The elastic deformation ratios Ea and Eb represented by 0% ≦ | Ea−Eb | ≦ 10%
A cyan toner set characterized by satisfying

Elastic deformation rate when said those deformed by the load 9.8 × 10 ^-5 N cyan toner a and the cyan toner b, a load is applied in the further ^{9.8 × 10 -5 N (Ea2)} , ( The cyan toner set according to claim 4, wherein Eb2) is 55% or more.

6. The cyan toner set according to claim 4, wherein the average circularity of the cyan toner a and the cyan toner b having a circle equivalent diameter of 2 μm or more is 0.920 to 0.970.

In an image forming method using an image forming apparatus having an intermediate transfer member, and magenta toner a and magenta toner b used for full color image formation,
The magenta toner a contains at least a binder resin, a colorant, and a wax, and has a lightness L ^* (a) of 45 or more in a powder state.
The magenta toner b contains at least a binder resin, a colorant, and a wax, and the brightness L ^* (b) in the powder state is lower than the brightness L ^* (a) of the magenta toner a.
Elasticity when the maximum displacement of the magenta toner a and magenta toner b with respect to the load of 9.8 × 10 ⁻⁵ N is (Sa), (Sb) and the plastic displacement is (Ia), (Ib), respectively. Deformation rates (Ea) and (Eb) are expressed by the following formula: Ea = (Sa−Ia) × 100 / Sa
Eb = (Sb−Ib) × 100 / Sb
0% ≦ | Ea−Eb | ≦ 10%
An image forming method characterized by satisfying the above.

Elastic deformation rate when said those deformed by the load 9.8 × 10 ^-5 N magenta toner a and the magenta toner b, a load is applied in the further ^{9.8 × 10 -5 N (Ea2)} , ( 8. The image forming method according to claim 7, wherein Eb2) is 55% or more.

In an image forming apparatus having an intermediate transfer member, and an image forming apparatus using a magenta toner a and a magenta toner b used for full color image formation,
The magenta toner a contains at least a binder resin, a colorant, and a wax, and has a lightness L ^* (a) of 45 or more in a powder state.
The magenta toner b contains at least a binder resin, a colorant, and a wax, and the brightness L ^* (b) in the powder state is lower than the brightness L ^* (a) of the magenta toner a.
Elasticity when the maximum displacement of the magenta toner a and magenta toner b with respect to the load of 9.8 × 10 ⁻⁵ N is (Sa), (Sb) and the plastic displacement is (Ia), (Ib), respectively. Deformation rates (Ea) and (Eb) are expressed by the following formula: Ea = (Sa−Ia) × 100 / Sa
Eb = (Sb−Ib) × 100 / Sb
0% ≦ | Ea−Eb | ≦ 10%
An image forming apparatus characterized by satisfying the above.

In a magenta toner set used for full-color image formation and containing magenta toner a and magenta toner b,
The magenta toner a contains at least a binder resin, a colorant, and a wax, and has a lightness L ^* (a) of 45 or more in a powder state.
The magenta toner b contains at least a binder resin, a colorant, and a wax, and the brightness L ^* (b) in the powder state is lower than the brightness L ^* (a) of the magenta toner a.
Elasticity when the maximum displacement of the magenta toner a and magenta toner b with respect to the load of 9.8 × 10 ⁻⁵ N is (Sa), (Sb) and the plastic displacement is (Ia), (Ib), respectively. Deformation rates (Ea) and (Eb) are expressed by the following formula: Ea = (Sa−Ia) × 100 / Sa
Eb = (Sb−Ib) × 100 / Sb
0% ≦ | Ea−Eb | ≦ 10%
A magenta toner set characterized by satisfying

Elastic deformation rate when said those deformed by the load 9.8 × 10 ^-5 N magenta toner a and the magenta toner b, a load is applied in the further ^{9.8 × 10 -5 N (Ea2)} , ( 11. The magenta toner set according to claim 10, wherein Eb2) is 55% or more.

12. The magenta toner set according to claim 10, wherein the magenta toner a and the magenta toner b have an average circularity of 0.920 to 0.970 in particles having an equivalent circle diameter of 2 μm or more.