1. Toner composition comprising:
resin core particles having outer surfaces, and
surface treatment,
wherein the surface treatment comprises at least first metal oxide particles having a surface area equivalent average particle diameter of greater than 25 nm and a surface energy of less than or equal to 28 ergcm2, as determined by methanol wettability midpoint at 22\xb0 C., tacked to the outer surfaces of the resin core particles, at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area, and wherein the toner composition comprises less than 0.013 g non-tacked surface treatment per square meter of resin core particles outer surface.
2. The toner composition of claim 1, wherein the at least first metal oxide particles are tacked to the resin core particles at a concentration sufficient to cover 10 to 65% of the resin core particle outer surfaces area.
3. The toner composition of claim 1, wherein the at least first metal oxide particles are tacked to the resin core particles at a concentration sufficient to cover 15 to 50% of the resin core particle outer surfaces area.
4. The toner composition of claim 1, wherein the at least first metal oxide particles are tacked to the resin core particles at a concentration sufficient to cover 15 to 40% of the resin core particle outer surfaces area.
5. The toner composition of claim 1 wherein said resin core particle are selected from the group consisting of condensation polymers, copolymers of styrene, copolymers of alkyl styrenes with acrylic monomers, polyesters, and mixtures thereof.
6. The toner of claim 1 wherein said resin core particles further comprise charge control agents, waxes or colorants.
7. The toner composition of claim 1 wherein the at least first metal oxide particles are selected from the group consisting of silica, titania and alumina.
8. The toner composition of claim 1
wherein the at least first metal oxide particles have a surface area equivalent average particle diameter of from 30 to 100 nm.
9. The toner composition of claim 1
wherein the at least first metal oxide particles have a surface area equivalent average particle diameter of from 35 to 75 nm.
10. The toner composition of claim 1
wherein the at least first metal oxide particles are silica particles which have been surface coated.
11. The toner composition of claim 10
wherein the surface treatment comprises a coating of polydimethylsiloxane.
12. The toner composition of claim 1,
wherein the surface treatment further comprises second metal oxide particles have a surface area equivalent average particle diameter of less than 25 nm.
13. The toner composition of claim 12,
wherein the second metal oxide particles have a surface energy of greater than 28 ergcm2, as determined by methanol wettability at 22\xb0 C.
14. The toner composition of claim 12,
wherein the surface treatment comprises first metal oxide particles having a surface area equivalent average particle diameter of greater than 35 nm and a surface energy of less than or equal to 28 ergcm2, as determined by methanol wettability midpoint at 22\xb0 C., second metal oxide particles have a surface area equivalent average particle diameter of less than 25 nm, and third metal oxide particles have a surface area equivalent average particle diameter of from 25 to 35 nm.
15. The toner composition of claim 14,
wherein the third metal oxide particles have a surface energy of less than or equal to 28 ergcm2, as determined by methanol wettability at 22\xb0 C.
16. The toner composition of claim 1,
wherein the toner composition comprises less than 0.010 g non-tacked surface treatment per square meter of resin core particles outer surface.
17. The toner composition of claim 1,
wherein the toner composition comprises less than 0.008 g non-tacked surface treatment per square meter of resin core particles outer surface.
18. A developer for developing electrostatic images comprising:
magnetic carrier particles; and
toner, wherein said toner comprises:
resin core particles having outer surfaces, and
surface treatment,
wherein the surface treatment comprises at least first metal oxide particles having a surface area equivalent average particle diameter of greater than 25 nm and a surface energy of less than or equal to 28 ergcm2, as determined by methanol wettability midpoint at 22\xb0 C., tacked to the outer surfaces of the resin core particles, at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover at least 10% of the resin core particle outer surfaces area, and wherein the developer comprises less than 0.013 g non-tacked surface treatment per square meter of resin core particles outer surface, that is free to transfer between the outer surface of the resin core particles and outer surfaces of the magnetic carrier particles.
19. The developer of claim 18, wherein the magnetic carrier particles make up 60 to 99 weight percent of the developer; and the toner makes up 1 to 40 weight percent of the developer, and further wherein the surface treatment comprises at least first metal oxide particles having a surface area equivalent average particle diameter of from 30 to 100 nm, at a concentration to provide a total projected area of the first metal oxide particles sufficient to cover 10 to 65% of the resin core particle outer surfaces area, and wherein the developer comprises less than 0.010 g non-tacked surface treatment per square meter of resin core particles outer surface, that is free to transfer between the outer surface of the resin core particles and outer surfaces of the magnetic carrier particles.
20. The developer of claim 19, wherein the magnetic carrier particles comprise strontium ferrite.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A color processing apparatus comprising:
a viewing condition acquisition unit configured to acquire a viewing condition under which a user views a color image and a reference viewing condition which serves as a reference;
a color patch configuration setting unit configured to set a configuration of color patches corresponding to the viewing condition based on a result of comparison between a reference color gamut which is a color gamut corresponding to the reference viewing condition, and a viewing color gamut which is a color gamut corresponding to the viewing condition under which the user views the color image;
a generation unit configured to generate output data for outputting a color chart including color patches corresponding to the viewing condition based on the setting of the color patch configuration setting unit;
a colorimetric value acquisition unit configured to acquire colorimetric values of the color patches contained in the color chart obtained by outputting the output data using an output device;
the generation unit further configured to generate a profile concerning a color processing condition suited to the viewing condition, based on the colorimetric values acquired by the colorimetric value acquisition unit;
the color patch configuration setting unit is further configured to adds a number of the color patches depending on a difference between the viewing color gamut and the reference color gamut to a number of the color patches corresponding to the reference color gamut, and sets a configuration of the color patches if either a lightness range, a maximum color saturation, or a volume of the viewing color gamut is larger than those of the reference color gamut, and the color patch configuration setting unit reduces the number of the color patches depending on a difference between the reference color gamut and the viewing color gamut, from the number of the color patches corresponding to the reference color gamut, and sets a configuration of the color patches if either the lightness range, the maximum color saturation, or the volume of the viewing color gamut is smaller than those of the reference color gamut.
2. A color processing method comprising:
acquiring a viewing condition under which a user views a color image and a reference viewing condition which serves as a reference;
setting a configuration of color patches corresponding to the viewing condition based on a result of comparison between a reference color gamut which is a color gamut corresponding to the reference viewing condition, and a viewing color gamut which is a color gamut corresponding to the viewing condition under which the user views the color image;
generating output data for outputting a color chart including color patches corresponding to the viewing condition based on the configuration of color patches;
acquiring colorimetric values of the color patches contained in the color chart obtained by outputting the output data using an output device; and
generating a profile concerning the color processing condition according to the viewing condition, based on the colorimetric values acquired in the colorimetric value acquired step.
adding a number of the color patches depending on a difference between the viewing color gamut and the reference color gamut to a number of the color patches corresponding to the reference color gamut, and sets a configuration of the color patches if either a lightness range, a maximum color saturation, or a volume of the viewing color gamut is larger than those of the reference color gamut, and the color patch configuration setting unit reduces the number of the color patches depending on a difference between the reference color gamut and the viewing color gamut, from the number of the color patches corresponding to the reference color gamut, and sets a configuration of the color patches if either the lightness range, the maximum color saturation, or the volume of the viewing color gamut is smaller than those of the reference color gamut.
3. A non-transitory computer-readable storage medium storing a program for a color processing apparatus, which causes a computer to execute a color processing method according to claim 2.