Abstract: A composition and a method of forming a liquid developer or a constituent of a liquid developer for electrostatography comprising the steps of dispersing at least one monomer in silicone fluid and polymerizing the at least one monomer to form polymer particles in the silicone fluid. A homopolymer or a copolymer may be formed and a colorant, such as a pigment or dye, and a charge control agent may be added before or after the polymerization.

Abstract: A method of production of microparticles of a thermoplastic polymer suitable as a toner for electrostatographic processes comprising the steps of melting the material in a continuous non-solvent phase having a boiling point higher than the melting point of the thermoplastic polymer, mixing the thermoplastic polymer in the continuous phase to produce an emulsion, and cooling the emulsion to produce a dispersion of solid microparticles of the thermoplastic polymer in the continuous phase. The thermoplastic polymer may include pigments or dyes to provide colored toner particles. A surface active agent may be used to control particle size.

Abstract: A liquid developer for electrostatography comprising a silicone fluid, marker particles and a charge control agent which is soluble in the silicone fluid. The charge control agent may be an organo-metallic compound such as an organo titanate selected from tetra-2-ethyl hexyl titanate, tetra-n-butyl titanate and tetra isopropyl titanate. The organo-metallic compound may be present in a range of from 0.01 to 10% by weight of the toner particles, with a preferred range of 0.1 to 2% by weight. A colourant may also be included.

Abstract: To provide for adhesion of toner particles on a latent image on a ferroelectric material substrate, the toner is so constituted that, upon being transported in close proximity to the ferroelectric substrate, the toner will shape itself into a wave to form a hydraulic meniscus, so that the toner will be adhered by hydraulic meniscus toning. The toner must have low electrical conductivity and is so formulated that particles are kept as discrete entities without interconnection to each other by mechanical or electrical binding. The toner materials can be acrylics, acrylic copolymers, polyethylene, polyethylene vinylacetate copolymers; suitable solvents are aliphatic solvent soluble rosin, rosin esters, rosin ester derivatives, phthalate esters and abietic acid esters; the thermoplastic polymer should be soluble in the dispersant between about 90.degree. C. to 100.degree. C., but insoluble at ambient temperature, and the plasticizer is soluble in the dispersant at both elevated and ambient temperature.

Abstract: An emulsified polymer color toner in a liquid carrier is provided for application to a latent electrostatic image on an electrostatographic recording member and transferred to a receptor sheet. The color toner consists of a colorant and a polymeric binder. A polymer solvent is applied to the receptor sheet surface carrying the deposited toner layer to dissolve part of the binder sufficient to transparentize the color layer, glaze and to fuse the toner layer. The glazing, transparentizing and fusing is effected without increase in dot gain. The polymer dispersant is insoluble in the toner carrier. The polymer solvent is removed from the receptor sheet and the sheet can be polished after removal of the solvent.

Abstract: The method of preparing a lithographic printing plate containing ink receptive printing image areas and water receptive non-printing background areas in which the plate consists of a substrate having on one side thereof in sequence an electrically conductive layer and a photoconductive layer consisting of fully crystalline inorganic photoconductive substance. The method comprises the steps of forming an electrostatic latent image on the surface of said photoconductive layer, developing the electrostatic latent image to define the ink receptive printing image areas on the surface, and applying to the surface an aqueous chromic acid solution.

Abstract: A method for pressure induced development of electrostatic latent images comprising forming an electrostatic latent image on a support member and subsequently placing the image bearing surface of the member in face contact with a receiving sheet, applying a dispersion to at least one of the contacting surfaces in a first state wherein the flow properties of the dispersion are non-Newtonian and the dispersion consists of a liquid phase and of a solid phase comprising flocculated electroscopic marking particles forming a matrix sufficiently strong to prevent extraction of individual electroscopic marking particles from the matrix by electrostatic attraction, using a pressure roller to apply to the dispersion a shear stress of sufficient magnitude to convert the dispersion to a second state wherein the flow properties of the dispersion become Newtonian and the solid phase is deflocculated in the liquid phase to allow individual electroscopic marking particles to deposit in accordance with the latent image, and s

Abstract: The method of developing an electrostatic latent image contained on a surface comprising the steps of applying to a surface a dispersion in a first state wherein the flow properties of the dispersion are non-Newtonian and wherein the dispersion consists of a liquid phase and of a solid phase comprising flocculated electroscopic marking particles forming a matrix sufficiently strong to prevent extraction of individual electroscopic marking particles from the matrix and applying to the dispersion a shear stress of sufficient magnitude to convert the dispersion from the first state to a second state wherein the flow properties of said dispersion become Newtonian and wherein said solid phase is deflocculated.