Abstract: A laser-induced thermal imaging system having a multi-layer construction donor element and a receptor element for the preparation of a metallic digital half tone color proof having an improved shiny metallic appearance. The donor element includes a substrate on which is coated at least two layers. The donor element includes a first layer coated on one side of the substrate having at least a first donor binder and a cationic infrared absorbing dye. The donor layer also includes a distinct second layer coated on the first layer. The second layer includes at least a second donor binder, a cationic infrared absorbing dye, a latent crosslinking agent, a fluorocarbon additive, metallic flakes and a dispersible material. The receptor element of the present invention includes a substrate coated with at least a receptor binder and a bleaching agent.

Abstract: A black donor for use in a laser addressable thermal transfer system, wherein the black donor comprises a substrate having coated thereon at least one black color layer comprising a binder and colorants. The colorants include a non-infrared absorbing black dye or pigment and about 10% to about 50% of a carbon black pigment, based on the total weight of the colorants in the black color layer.

Abstract: A liquid electrophotographic toner having a coordinated association of steric stabilizer and charge directing moiety displays improved characteristics when the charge directing moiety has a monovalent alkali metal or ammonium cation bonded thereto.

Abstract: A method for operating an electrophotographic proofing system for generating color proofs from image information during multiple imaging cycle proofing runs. Charge model information, development model information and toner replenishment model information are stored for each component color. Actual photoconductor charge characteristics are measured during the imaging cycles of the proofing runs. Actual toner characteristics from component color test patches developed during the imaging cycles are also measured. The photoconductor is charged during the imaging cycles as a function of the charge characteristics measured during a preceding imaging cycle for the same component color, and a as function of the charge model information for the color. The photoconductor is toned during imaging cycles as a function of toner characteristics measured from test patches during a preceding imaging cycle for the same component color and as a function of the development model information for the color.

Abstract: Liquid toners for developing electrophotographic images contain dispersed toner particles which are based on a polymer with multiple characteristics. These particles comprise a thermoplastic resinous core with a T.sub.g below room temperature which is chemically anchored to an amphipathic copolymer steric stabilizer containing covalently attached groups of organic acid containing moieties having pKa's less than 4.5 which in turn are chemically bonded to metal soap containing compounds derived from organic acids having a pKa greater than 4.5. The toner particles so formed have advantageous properties of high charge/mass, and good charge and dispersion stability.

Abstract: There is disclosed here a class of liquid toner dispersions for developing electrophotographic images which give very high contrast half-tone dots with low contrast scanning light beams such as gaussian laser beams. The advantage of these toners is enhanced by the use of high electric field electrophoretic development conditions with high replenishment rate under which conditions rapid development to high image densities is obtained. This class of toners has toner particles of high mobility, low particle concentration in the dispersion, and a low fraction of its conductivity in the liquid milieu.

Abstract: A black liquid toner is provided. The toner is transparent to light in the near infrared region and can be used in a half-tone color proofing. The photoconductor can be imaged through the toner. The toner comprises a mixture of a first and second pigment in a liquid carrier.

Abstract: Liquid toners for developing electrophotographic images contain dispersed toner particles which are based on a polymer with multi-characteristics. These particles comprise a thermoplastic resinous core with a Tg below room temperature, which is chemically anchored to an amphipathic copolymer steric stabilizer containing covalently attached groups of a coordinating compound which in turn are capable of forming covalent links with organo-metallic charge directing compounds and a thermoplastic ester resin that functions as a charge enhancing component for the toner. The toner particles so formed have advantageous properties of high charge/mass, and good charge and dispersion stability.

Abstract: Liquid toners for developing electrophotographic images contain dispersed toner particles which are based on a polymer with multi-characteristics. These particles comprise a thermoplastic resinous core with a T.sub.g below room temperature, which is chemically anchored to an amphipathic copolymer steric stabilizer containing covalently attached groups of a coordinating compound which in turn are capable of forming covalent links with organo-metallic charge directing compounds. The toner particles so formed have advantageous properties of high charge/mass, and good charge and dispersion stability.

Abstract: Liquid toners for developing electrophotographic images contain dispersed toner particles which are based on a polymer with multi-characteristics. These particles comprise a thermoplastic resinous core with a T.sub.g below room temperature, which is chemically anchored to an amphipathic copolymer steric stabilizer containing covalently attached groups of a coordinating compound which in turn are capable of forming covalent links with organo-metallic charge directing compounds. The toner particles so formed have advantageous properties of high charge/mass, and good charge and dispersion stability.

Abstract: A thermal imaging transfer process and donor sheet are described. The donor sheet comprises a layer of particulate colorant/binder on a substrate. Essentially individual particles are transferred during imaging to provide a high resolution image.

Abstract: This application discloses a method of making high quality color prints by electrophotography. The prints are particularly suited to color proofing. A single photoconductive drum is used together with means to electrostatically charge, laser-scan expose, and toner develop during one rotation. In successive rotations different colored images corresponding to color separation images are assembled in register on the drum. This assembled color image is transferred to a receptor sheet in a final rotation of the drum.