摘要:
A developing device configured to carry out development of an electrostatic image using color toner particles and transparent toner particles includes color and transparent developing units configured to store toner particles, carrier particles, and additive particles and configured to carry out development of the electrostatic image; color and transparent developer replenishment containers configured to store replenishment developers including at least the toner particles and the carrier particles and configured to replenish developing units with the replenishment developers; and color and transparent developers openings provided at the developing units and configured to discharge the developers in the developing units outside the developing units while replenishing the developing units with the replenishment developers, wherein the carrier particle weight ratio of the transparent replenishment developer is higher than the carrier particle weight ratio of the color replenishment developer.
摘要:
The toner of the present invention comprises at least a pigment and a binder resin, wherein a filtrate obtained by filtering a dispersion comprising 0.2 g of the toner dispersed in 100 ml of tetrahydrofuran through a filter with a pore size of 0.45 μm, when it is measured by a spectrophotometer, has: a maximum absorption between 380 nm and 440 nm wherein the absorbance at the maximum absorption is 1 or higher; a maximum absorption between 640 nm and 680 nm wherein the absorbance at the maximum absorption is 0.2 or higher; or a maximum absorption between 490 nm and 560 nm wherein the absorbance at the maximum absorption is 0.15 or higher. The toner of the present invention is excellent in dispersibility of the pigment and can provide good images.
摘要:
A method of producing an iridescent reflecting surface on an object is presented. Flakes of dry non metallic reflecting material such as cholesteric liquid crystal (CLC) material are applied to the surface so that the flakes are parallel with the surface and bound with a binder to the surface.
摘要:
A color toner composition including at least toner particles including at least a binder resin; a colorant and a release agent dispersed in the binder resin; and a titania as an external additive, wherein the colorant has an average dispersion particle diameter not greater than 0.5 μm; the release agent and the binder resin are insoluble to each other; the toner particles satisfy the relationship: 0.05≦Dw/D4≦0.4, wherein Dw represents an average dispersion particle diameter of the release agent and D4 represents a weight-average particle diameter of the toner particles; and the titania has a segregation rate of from 0.5 to 5%.
摘要:
The present invention provides an electrostatic image developing toner comprising a binder resin, a colorant and a releasing agent, the toner having a temperature interval in which the value of loss elastic modulus varies 100 times or more within a temperature range of 10° C. in the temperature interval between 60 and 95° C. under measuring conditions of an angular frequency of 6.28 rad/sec and a temperature rise rate of 1° C./min, wherein the loss elastic modulus G″ is 5×103 Pa or more and 5×104 Pa or less and the tangential loss is 1.5 or more and 3.0 or less in a temperature range from 100° C. to 140° C. under a measuring condition of a temperature change rate of 1° C./min.
摘要:
A system and method for printing documents that are difficult to forge and that are easy to visually verify are disclosed. The system includes a colorant for printing an image on a surface of a document and a dye for forming a latent version of the image underneath the surface and a substrate that includes a migration agent for facilitating the migration of the dye through at least a portion of the substrate. The migration-enhancing agent may be coated onto a portion of the substrate or embedded within the substrate.
摘要:
An electrophotographic toner is prepared by using a binder resin having an acid value of 5 to 15 mgKOH/g, a salicylic metal complex, a colorant, and a releasing agent. In the preparation determination for the third root distribution of a light emission voltage by helium atmospheric pressure microwave induction plasmas for carbon atoms derived from the binder resin and metal atoms derived from the salicylic metal complex is made based on a value measured by a micro-particle measuring apparatus including a normal pressure or atmospheric pressure space, a capillary tube inserted at one end in the space, a microwave source, a cavity, a quartz tubular reactor, a discharge means, an analyses means, and a signal detection portion. The absolute deviation showing the scattering of approximate straight lines approximated by a least squares method is controlled to be 0.08 or less.
摘要:
A chemically prepared toner for electrophotographic printers and method therefor using a unique polymeric dispersant. The chemically prepared toner includes agglomerated polymeric dispersant stabilized pigment particles, a fuser release agent, a charge control agent dispersion, and a self-stabilized essentially surfactant free latex binder. The polymeric dispersant includes at least three segments, a hydrophilic polymeric segment, a hydrophobic polymeric segment, and a protective colloid or reactive surfactant segment. The weight average molecular weight range of the dispersant ranges from about 5,000 to about 30,000, and a hydrophobicity ranging from about 10 to about 90 percent by weight. The chemically prepared toner includes agglomerated toner particles have a unimodal particles size distribution with a number average particle size (N) ranging from about 5.0 to about 8.5 microns and a volume average particle size (V) ranging from about 5.0 to about 8.5 microns.
摘要:
A color image forming black developer is provided which has a volume resistivity equal to those of the respective color developers of yellow, magenta and cyan and makes it possible to obtain an image of high image quality. The color image forming developer uses, as a coloring agent of toner of a black developer, a coloring agent containing a yellow coloring agent used for a yellow developer, a magenta coloring agent used for a magenta developer and a cyan coloring agent used for a cyan developer at a predetermined ratio.
摘要:
A toner includes particles of a resin, an optional colorant, a first wax and a second wax, where the toner particles are prepared by an emulsion aggregation process. Additional waxes can also be added for different properties.