Claims
- 1. A toner having an excellent transparency for full color development, which comprises a binder resin and a magenta coloring dispersed therein wherein (i) said magenta coloring agent is a quinacridone pigment, (ii) said pigment is dispersed in the binder resin in the form of fine particles and that when the toner is formed into a layer having a thickness of 0.9 .mu.m, the area occupied by the dispersed pigment in 780,000 .mu.m.sup.2 of the area of the formed surface is such that the number of dispersed pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 40 and the number of dispersed pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 20, and (iii) the binder resin has an electroconductivity of 1.0.times.10.sup.-9 to 5.0.times.10.sup.-9 (s/cm).
- 2. A toner for full color development according to claim 1, wherein the melting point of the binder resin is 80.degree. to 130.degree. C.
- 3. A toner for full color development according to claim 1, wherein the number of dispersed pigment particles having a size of 10 to 12.5 .mu.m is smaller than 30 and the number of dispersed pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 10.
- 4. A toner having an excellent transparency for full color development according to claim 1, wherein said binder resin is a polyester resin.
- 5. A toner having an excellent transparency for full color development, which comprises a binder resin and a cyan coloring agent dispersed therein wherein (i) said cyan coloring agent is a copper phthalocyanine pigment, (ii) said pigment is dispersed in the binder resin in the form of fine particles and that when the toner is formed into a layer having a thickness of 0.9 .mu.m, the area occupied by the dispersed pigment in 780,000 .mu.m.sup.2 of the area of the formed surface is such that the number of dispersed pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 80 and the number of dispersed pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 50, and (iii) the binder resin has an electroconductivity of 1.0.times.10.sup.-9 to 5.0.times.10.sup.-9 (s/cm).
- 6. A toner for full color development according to claim 5, wherein the melting point of the binder resin is 80.degree. to 130.degree. C.
- 7. A toner for full color development according to claim 5, wherein the number of dispersed pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 70 and the number of dispersed pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 40.
- 8. A toner having an excellent transparency for full color development according to claim 5, wherein said binder resin is a polyester resin.
- 9. A toner having an excellent transparency for full color development, which comprises a binder resin and a yellow coloring agent dispersed therein wherein (i) said yellow coloring agent is a benzidine pigment, (ii) said pigment is dispersed in the binder resin in the form of fine particles and that when the toner is formed into a layer having a thickness of 0.9 .mu.m, the area occupied by the dispersed pigment in 780,000 .mu.m.sup.2 of the area of the formed surface is such that the number of dispersed pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 15 and the number of dispersed pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 10, and (iii) the binder resin has an electroconductivity of 1.0.times.10.sup.-9 to 5.0.times.10.sup.-9 (s/cm).
- 10. A toner for full color development according to claim 9, wherein the melting point of the binder resin is 80.degree. to 130.degree. C.
- 11. A toner for full color development according to claim 9, wherein the number of dispersed pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 10 and the number of dispersed pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 5.
- 12. A toner having an excellent transparency for full color development according to claim 9, wherein a said binder resin is a polyester resin.
- 13. A method of full color development, which comprises
- (1) exposing a photosensitive layer to a light from a multiple-color original through a color-separating filter to form an electrostatic image,
- (2) developing said electrostatic image by a toner,
- (3) transferring a toner image to a transfer material, and
- (4) repeating steps (1) to (3) using magenta, cyan, and yellow color toners and a black toner to form a multiple-color image in which each of the toner images is overlapped, wherein
- (A) said magenta toner is a toner comprising a binder resin and a quinacridone pigment, said pigment is dispersed in the binder resin in the form of fine particles and that when the toner is formed into a layer having a thickness of 0.9 .mu.m, the area occupied by the dispersed pigment in 780,000 .mu.m.sup.2 of the area of the formed surface is such that the number of dispersed quinacridone pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 40 and the number of dispersed quinacridone pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 20, and said binder resin has an electroconductivity of 1.0.times.10.sup.-9 to 5.0.times.10.sup.-9 (s/cm),
- (B) said cyan toner is a toner comprising a binder resin and a copper phthalocyanine pigment, said pigment is dispersed in the binder resin in the form of fine particles and that when the toner is formed into a layer having a thickness of 0.9 .mu.m, the area occupied by the dispersed pigment in 780,000 .mu.m.sup.2 of the area of the formed surface is such that the number of dispersed copper phthalocyanine pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 80 and the number of dispersed copper phthalocyanine pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 50, and said binder resin has an electroconductivity of 1.0.times.10.sup.-9 to 5.0.times.10.sup.-9 (s/cm), and
- (C) said yellow toner is a toner comprising a binder resin and a benzidine pigment, said pigment is dispersed in the binder resin in the form of fine particles and that when the toner is formed into a layer having a thickness of 0.9 .mu.m, the area occupied by the dispersed pigment in 780,000 .mu.m.sup.2 of the area of the formed surface is such that the number of dispersed benzidine pigment particles having a size of 10 to 12.5 .mu.m.sup.2 is smaller than 15 and the number of dispersed benzidine pigment particles having a size of 12.5 to 15.0 .mu.m.sup.2 is smaller than 10, and said binder resin has an electroconductivity of 1.0.times.10.sup.-9 to 5.0.times.10.sup.-9 (s/cm).
Priority Claims (6)
Number |
Date |
Country |
Kind |
1-299718 |
Nov 1989 |
JPX |
|
1-299719 |
Nov 1989 |
JPX |
|
1-301997 |
Nov 1989 |
JPX |
|
1-301998 |
Nov 1989 |
JPX |
|
1-301999 |
Nov 1989 |
JPX |
|
1-302000 |
Nov 1989 |
JPX |
|
Parent Case Info
This is a continuation in part application of a patent application Ser. No. 07/970,610 filed Oct. 27, 1992 which is a continuation application of Ser. No. 07/615,915, Nov. 20,1990, both of the applications having been abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4312932 |
Hauser et al. |
Jan 1982 |
|
4590139 |
Imai et al. |
May 1986 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
615915 |
Nov 1990 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
970610 |
Oct 1992 |
|