Abstract: Provided is an electrophotographic photosensitive member that can suppress a ghost image while keeping its sensitivity satisfactory. The electrophotographic photosensitive member includes a support, an intermediate layer on the support, and a photosensitive layer on the intermediate layer, and the intermediate layer contains a compound having a specific structure.

Abstract: A radiation-sensitive material comprising a support and a radiation sensitive composition on the support is disclosed, wherein the radiation sensitive composition includes a dispersion containing nanoparticles of a sensitizer.

Abstract: A method of forming a xerographic image having at least one portion with a gloss different from a gloss of another portion of the xerographic image includes xerographically forming a toner image on a surface of a substrate and forming a finish over the toner image at the at least one portion, the finish being made of a differential gloss finish coating material that has a gloss different from that of the toner image. The differential gloss finish coating material is preferably an emulsion aggregation toner that is substantially free of pigments that adversely affect the transparency of the toner following fusing, the toner having gloss tunability through control of the amount of crosslinked portions included in the toner.

Abstract: Clean running printing plates for flexographic printing may be prepared by the co-photopolymerization of a mixture comprising a liquid, acrylate or methacrylate-terminated polyurethane oligomer, an ethylenically unsaturated compound, and a photopolymerization initiator. The liquid oligomer is preferably the acrylated or methacrylated reaction product of a diisocyanate, a liquid hydrophobic polyalkylene oxide, and a diol that is at least one of polypropylene oxide and a copolymer of ethylene oxide and propylene oxide, where reaction with a hydroxy-containing acrylate or methacrylate compound incorporates terminal acrylate or methacrylate groups into the oligomer. The photopolymerizable blend may be used to form printing plates for flexographic printing, where the plates have a reduced tendency to pick up paper fibers, dust and dried ink during the printing process. Methodology for preparing the printing plates, and printing with the printing plates of the invention is also provided.

Abstract: An electrophotographic light-sensitive material which has improved electrostatic characteristics and image forming performance and is excellent particularly in reproducibility of highly accurate image using a liquid developer and image forming performance upon a scanning exposure system using a laser beam of a low power.The electrophotographic light-sensitive material contains, as a binder resin, at least one resin (A) which has a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 and contains not less than 30% by weight of a polymer component of the formula (I) and from 0.5 to 15% by weight of a specified polar group-containing polymer component and at least one resin (B) which is a starlike polymer having a weight average molecular weight of from 3.times.10.sup.4 to 1.times.10.sup.6 and comprising an organic molecule having bonded thereto at least three polymer chains each containing a polymer component containing a specified polar group and a polymer component of the formula (I).

Abstract: An electrophotographic light-sensitive material which has improved electrostatic characteristics and image forming performance and is excellent particularly in reproducibility of highly accurate image using a liquid developer and image forming performance upon a scanning exposure system using a laser beam of a low power.The electrophotographic light-sensitive material contains, as a binder resin, a low molecular weight resin (A) comprising an organic molecule having bonded thereto at least three polymer chains each containing a polymer component of formula (I) and a polymer component having a specified polar group, and a resin (B) which is a medium to high molecular weight AB block copolymer comprising an A block containing a specified polar group and a B block containing a polymer component of formula (I). ##STR1## wherein a.sup.1 and a2: hydrogen, halogen, a cyano group, a hydrocarbon group, --COOR.sup.4 or --COOR.sup.4 bonded via a hydrocarbon group (R.sup.4 : hydrocarbon group); and R.sup.

Abstract: The invention provides an electrophotographic photoreceptor which has a practical high sensitivity to red light or infrared ray, especially semiconductor laser beam and is excellent in storage stability. The photoconductor layer of this photoreceptor comprises comprises an inorganic photoconductor, a binder resin, a sensitizing dye and optionally an acid anhydride, wherein said sensitizing dye is at least one of dye compounds represented by the following formulas [I], [II], [III] and [IV]: ##STR1## In the above formulas, the respective symbols are as defined hereinbefore.

Abstract: An electrophotographic lithographic printing plate precursor having a photoconductive layer containing resin (A) having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 and containing a polymer component of the specified repeating unit and a polymer component having a polar group and dispersed resin grain (L) which is obtained by dispersion polymerization of monomer (C) containing a functional group capable of forming at least one group selected from a thiol group, a sulfo group, an amino group and a ##STR1## group upon decomposition in the presence of a dispersion stabilizing resin soluble in a non-aqueous solvent and which has a silicon and/or fluorine atom-containing substituent.The electrophotographic lithographic printing plate precursor has good electrophotographic characteristics and water retentivity due to the suitable interaction between zinc oxide, a spectral sensitizing dye, the resin (A) and the dispersed resin grain (L).

Abstract: An electrophotographic lithograph printing plate material having an enhanced sensitivity to laser rays, an excellent heat resistance and a low dark decay comprises an electroconductive, water-resistant substrate and an electrophotographic layer comprising a photoconductive zinc oxide, a resinous binder and a sensitizing dye material which comprises at least one compound (A) of the formula (I) and at least one compound (B) of the formula (II): ##STR1## wherein each of A.sub.1 and A.sub.2 represents a C.sub.5-7 polymethine group non-substituted or substituted with at least one substituent, for example, --Cl, the substituted polymethine group may have a cyclic structure, for example, of: ##STR2## each of from B.sub.1 to B.sub.4 is a divalent non-substituted or substituted, benzene or naphthalene group, each of from X.sub.1 to X.sub.4 is a S, Se, or O atom or a --C(CH.sub.3).sub.2 -- group, each of from R.sub.1 to R.sub.4 is a C.sub.1-5 alkyl group, each of M.sub.1 and M.sub.

Abstract: An electroghraphic lithograph printing plate material having an enhanced spectral sensitivity to semiconductor laser rays, comprises a electroconductive water-resistant support and electrophotographic layer formed on the support and comprising a photoconductive zinc oxide, a binder resin and a sensitizing dye material comprising (a) 30 to 99% by weight of a low adsorption sensitizing dye for which the zinc oxide exhibits a low adsorption rate of less than 90% and (b) 1 to 70% by weight of a high adsorption sensitizing dye for which the zinc oxide exhibits a high adsorption rate for 90% or more, the adsorption rate being measured by spectrophotometry.

Abstract: An electrophotographic material having an enhanced sensitivity to laser rays comprises,(A) an electroconductive, water-resistant substrate, and(B) a laser-sensitive electrophotographic layer comprising (a) a finely divided photoconductive zinc oxide, (b) a resinous binder, (c) a sensitizing dye comprising at least one member selected from the compounds of the formulae (I): ##STR1## wherein R.sub.1 and R.sub.2 are respectively --CH.sub.3, --C.sub.2 H.sub.5 or --CH.sub.2 --CH.dbd.CH.sub.2 radical and X is a halogen atom, and (d) a sensitizing assistant comprising at least one member selected from (a) aliphatic carboxylic anhydrides of the formula (II): ##STR2## wherein Y.sub.1 is a hydrogen or halogen atom and Y.sub.2 is a halogen atom, and (b) aromatic carboxylic anhydride derived from aromatic carboxylic acids having at least three--COOH groups attached to a benzene ring.

Abstract: A method for making a photoconductive powder which comprises the steps of preparing fine particles of metal oxide or metal hydroxide by hydrolyzing a metal alkoxide or metal acetylacetonate; and immersing the fine particles into pigment containing suspensions to provide three types of composite particles. Each of the suspensions contains a respective pigment having a spectral absorption band within the wavelength region of a one of the primary colors of the additive principle. Each type of the resultant composite particles is composed of the fine particles of the metal oxide or metal hydroxide and the associated pigment as a principal component.

Abstract: A photoconductive composition which exhibits excellent dark reduction retention, excellent sensitivity to radiation from the near infrared region to the infrared region as well as excellent long-term stability, is comprised of an inorganic photoconductor, a cyclic acid anhydride and a spectral sensitizing dye dispersed in a binding resin. A laser beam scanning exposure can be performed on said composition to produce electrophotographic images.

Abstract: An electrophotographic material having an enhanced sensitivity to laser rays comprises,(A) an electroconductive substrate, and(B) a laser-sensitive electrophotographic layer comprising (a) a finely divided photoconductive zinc oxide, (b) a resinous binder, (c) a sensitizing coloring material comprising at least one member selected from the compounds of the formulae (I) and (II): ##STR1## in which m.sup.1, m.sup.2, n.sup.1 and n.sup.2 are 1 to 8, R.sup.1 and R.sup.2 are --COO or --SO.sub.3, R.sup.3 and R.sup.4 are H, --CH.dbd.CH.sub.2 --COOH, --SO.sub.3 H, --COONa, --SO.sub.3 Na, COOK or --SO.sub.3 K, X is Cl, Br, I or --ClO.sub.4, ##STR2## and, (d) a sensitizing assistant comprising at least one carboxylic anhydride of the formula (III): ##STR3## wherein R.sup.5 and R.sup.6 are H, C.sub.1-8 alkyl or phenyl.

Abstract: A photoconductive composition is disclosed, comprising at least an inorganic photoconductive material, a sensitizing dye and a resin binder wherein the sensitizing dye is a compound containing at least one acidic group in the molecule thereof as represented by the formula (I): ##STR1## wherein all the symbols are as defined in the appended claims.