Abstract: A magenta toner for developing an electrostatic image is formed of magenta toner particles containing at least a binder resin and a magenta pigment. The magenta pigment is a solid solution pigment comprising C.I. Pigment Red 122, C.I. Pigment Red 202 and C.I. Pigment Violet 19. The magenta toner particles are preferably formed by suspension polymerization of a polymerizable monomer mixture including a polymerizable monomer and the solid solution pigment in an aqueous medium.

Abstract: A full color toner for nonmagnetic one-component development usable in a developer device including a developer roller and a blade, the blade serving to regulate a toner layer formed on the developer roller into a uniform thickness and to supply electric charges to toners by triboelectric charging, the full color toner for nonmagnetic one-component development including (a) fine resinous particles including at least a colorant and a binder resin having a polyester resin as a main component; and (b) additives externally applied onto a surface of the fine resinous particles, the additives including inorganic fine particles consisting of positively chargeable, inorganic fine particles and negatively chargeable, inorganic fine particles when subjecting the additives to triboelectric charging with an iron powder.

Abstract: An electrophotographic photosensitive member is comprised of a support and a photosensitive layer formed on the support. The electrophotographic photosensitive member has a surface layer which contains a resin having at least one of the structural units represented by the following formula: ##STR1## wherein the bond represented by a broken line may be present, and when present, m is 4 and when m is 6, n represents an integer of 0 or more, and R.sub.1 and R.sub.2 represent each independently hydrogen, halogen, hydroxy, a substituted or unsubstituted alkyl, a substituted or unsubstituted unsaturated aliphatic hydrocarbon, a substituted or unsubstituted aryl, a substituted or unsubstituted cycloalkyl, a substituted or unsubstituted cyclodienyl, a substituted or unsubstituted alkoxy, a substituted or unsubstituted carbonyl, or a substituted or unsubstituted heterocyclic group.

Abstract: A surfactant free process for the preparation of toner comprising heating a mixture of an emulsion latex, a colorant, and a polyelectrolyte.

Abstract: A layered-form electrophotographic photoreceptor which is composed of a conductive substrate, a charge generating layer (CGL) laid on the conductive substrate, and a charge transporting layer (CTL) laid on the CGL, wherein the CGL includes .mu.-oxo-aluminum phthalocyanine dimer as a charge generating material (CGM), and the CTL comprises a specific hydrazone compound as a charge transporting material (CTM). The electrophotographic photoreceptor shows good stability and electric property (for example, good chargeability, low dark decay, and low residual potential), even if it is employed as a high-gamma photoreceptor which corresponds to a short wavelength light sauce such as LD ray and LED ray.

Abstract: A process for producing toner particles is conducted by:preparing toner precursor particles containing at least binder resin and coloring agent; andspherizing the toner precursor particles to obtain toner particles;wherein spherizing steps include;(1) dispersing the toner precursor particles in an aqueous medium containing a dispersant, thereby preparing a disperse system (a);(2) dispersing oil droplet particles containing a softening agent into an aqueous medium, thereby preparing a disperse system (b);(3) preparing a mixed disperse system (c) by adding the disperse system (a) to the disperse system (b), and causing the softening agent to be absorbed by the toner precursor particles in the mixed disperse system (c); and(4) removing the softening agent from the toner precursor particles.

Abstract: An electrophotographic imaging member including a supporting substrate coated with at least photoconductive layer, a charge transport layer and an overcoating layer, the overcoating layer includinga hydroxy functionalized aromatic diamine anda hydroxy functionalized triarylamine dissolved or molecularly dispersed ina crosslinked polyamide matrix, the crosslinked polyamide prior to crosslinking being selected from the group consisting of materials represented by the following Formulae I and II: ##STR1## wherein: n is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100,000,R is an alkylene unit containing from 1 to 10 carbon atoms,between 1 and 99 percent of the R.sub.2 sites are --H, andthe remainder of the R.sub.2 sites are --CH.sub.2 --O--CH.sub.3, and ##STR2## wherein: m is a positive integer sufficient to achieve a weight average molecular weight between about 5000 and about 100000,R.sub.

Abstract: A flexible electrophotographic imaging member comprising a substrate and at least one imaging layer comprising a first charge transport material, free of long chain alkyl ester groups or long chain alkyl carboxyl groups, and a small amount of a different second charge transporting material containing only one long chain alkyl ester group dissolved or molecularly dispersed in a film forming binder, the at least one imaging layer having been formed by drying a coating comprising a solution of the first transporting material and second charge transporting material and the film forming polymer binder in a mixture of a low volatility solvent and a high volatility solvent. A method for fabricating this imaging member is also disclosed.

Abstract: A photosensitive recording material containing a support and a charge generating layer (CGL) in contiguous relationship (contact) with a charge transporting layer (CTL), containing an n-charge transporting material (n-CTM), wherein the binder of the charge generating layer (CGL) is made insoluble in methylene chloride by crosslinking, and the binder is composed essentially of one or more polyepoxy compounds self-crosslinked under the influence of an amine catalyst and/or crosslinked by reaction with at least one primary and/or secondary poly NH-group amine.

Abstract: A method of forming an image includes the steps of forming an electrostatic latent image on an organic photoconductive drum, applying a developer containing toner particles to a sleeve in which a permanent magnet member is disposed, developing the electrostatic latent image by relative rotation of the sleeve to the permanent magnet member such that a magnetic brush is formed on the sleeve, the magnetic brush brushing the surface of the photoconductive drum to form a toner image, transferring the toner image to a transfer means, fixing the transferred image, and cleaning the remaining toner particles from the image carrier with a fur brush. The developer contains toner particles comprising at least one binder resin and a colorant, and from 0.1 to 3 parts by weight per 100 parts by weight of the toner particles of finely powdered cleaning assistant is disposed on the surface of the toner particles. The toner particles have an average size of 2 to 9 .mu.

Abstract: A toner for developing electrostatic images includes a binder resin, a specific long-chain alkyl compound and a specific azo iron complex. The long-chain alkyl compound contains a terminal --OH or --COOH group and from about 35 to 150 (--CH.sub.2 --) groups. The azo iron complex has a cation including 75-98 mol. % of ammonium ion and another ion which is hydrogen, sodium, potassium or mixtures thereof.

Abstract: Disclosed is a photoconductive solution which has excellent charge characteristics with easy control of charge amount and is completely volatilized after baking. The solution contains 0.01 to 10 wt. % of one of dialkyl(C.sub.n H.sub.2n+1.sup.-) aminobenzil methacrylate(DMABMA) of n below 5, dialkyl(C.sub.n H.sub.2n+1.sup.-) aminophenyl acryloamide(DMAPAA) of n below 5, dialkyl(C.sub.n H.sub.2n+1.sup.-) aminophenyl methacryloamide (DMAPMA) of n below 5, and the mixture of two kinds or more of them as ultraviolet-sensitive material of a donor and an acceptor. The solution is formed by dissolving said one ingredient together with 10 to 20 wt. % of at least one of polystyrene (PS), polymethyl methacrylate(PMMA), polyalphamethylstyrene(PAMS) and polystyrene-oxazoline copolymer(PS-OX) as polymeric binder, in 20 to 85 wt. % of toluene or xylene as solvent.

Abstract: A carrier composition comprised of a core and coating thereover comprised of a polymer composite, a conductive component, and a matrix resin, and a second resin free of said conductive component.

Abstract: Cyclosaccharide-boron complexes consisting of 1 to 4 cyclodextrin units and one borate radical of the formula (I): ##STR1## have good charge control properties and lend themselves excellently to dispersion in toner, powder coating and electret binders.

Abstract: A magnetic carrier for use in a developer for developing latent electrostatic images is composed of magnetic carrier particles with a particle size of 35 .mu.m or less in an amount of 15 wt. % or more, and a developer is composed of the above carrier and a toner. An image formation method is composed of the steps of (a) uniformly charging the surface of a photoconductor to a predetermined polarity, (b) forming latent electrostatic images including low potential portions and high potential portions on the photoconductor by subjecting the charged surface of the photoconductor to selective light radiation corresponding to light images, thereby selectively reducing the potential of the surface of the photoconductor, and (c) developing the thus formed latent electrostatic images to visible toner images by bringing the developer into contact with the latent-electrostatic-images-bearing photoconductor.

Abstract: A toner for dry developing, containing a colorant and a binder and giving such a toner image on a transfer sheet upon fixation that has an image density I and a gross of G % when the toner deposits on the transfer sheet in an amount of M mg/cm.sup.2, wherein I, G and M have the following relationship:I=a.multidot.M+bwhere 0<a.ltoreq.3 and 0.ltoreq.b,G=.alpha..multidot.M+.beta.where 0<.alpha.<15 and 0.ltoreq..beta., andG.sub.AV .gtoreq.10where G.sub.AV is an average of G when M=0.2, 0.4, 0.6, 0.8 and 1 mg/cm.sup.2.

Abstract: A pigment includes a compound with a tetraazaporphyrin skeleton represented by formula (I): ##STR1## wherein M is a hydrogen atom, or an atom or compound capable of bonding to tetraazaporphyrin through a covalent bond or a coordinate bond; and R.sup.1 to R.sup.8 are each independently a hydrogen atom, a lower alkyl group which may have a substituent, or an aryl group which may have a substituent. In addition, the above-mentioned pigment is used as a charge generation material in an electrophotographic photoconductor comprising an electroconductive support and a photoconductive layer formed thereon.

Abstract: A process for the preparation of colored toners which comprises mixing a first toner comprised of resin, pigment particles, charge additive, and surface additives, with a second toner comprised of resin, pigment particles, and charge additive, and wherein the resulting colored toners contain from about 0.05 to about 0.5 weight percent of surface additives.

Abstract: An electrostatographic imaging member including an anti-curl layer, a supporting substrate having an electrically conductive layer, at least one imaging layer, an optional ground strip layer and an optional overcoating layer, the anti-curl layer including a polycarbonate film forming polymer binder containing 3,3,5-trimethylcyclohexane groups in the polycarbonate moiety.

Abstract: A photoreceptor fabrication method including: (a) depositing a charge generating layer; (b) depositing a first charge transport layer having a first charge carrier mobility value; and (c) depositing a second charge transport layer having a second charge carrier mobility value that is different from the first charge carrier mobility value; wherein steps (a), (b), and (c) occur in any order, wherein the difference in the first charge carrier mobility value and the second charge carrier mobility value is accomplished by:(i) wherein the first charge transport layer includes a first binder and a first charge transport material and the second charge transport layer includes a second binder and a second charge transport material, selecting the first binder to have a lesser solubility limit for the first charge transport material than the solubility limit of the second binder for the second charge transport material; or(ii) wherein the first transport layer includes a first polymeric compound composed of a first char