Abstract: A recording sheet comprising a support having a developer layer thereon, the developer layer containing a phenol resin and an aqueous emulsion of an oily material and produced by admixing a coating composition containing a phenol resin and an aqueous emulsion of an oily material and coating the resulting mixture on a support.

Abstract: A migration imaging system wherein migration imaging members typically comprising a substrate, a layer of softenable material, and migration marking material, additionally contain one or more overlayers of material to produce improved results in the imaging system. The overlayer may variously comprise another layer of softenable material, a layer of material which is harder than the softenable material layer, or a gelatin layer.

Abstract: Benzyl aryl ethers are useful solvents for chromogenic materials in preparing pressure-sensitive record material wherein a colorless or substantially colorless chromogen is reacted in the presence of a benzyl aryl ether solvent with an acidic sensitizing material to form a colored mark in a pattern determined by the application of localized pressure to the record material. The benzyl aryl ether solvents are heat stable and give particularly fast color development on phenolic resin coated papers.

Abstract: Images are formed with imaging members comprising one or more migration layers and a softenable layer which may be a circulation layer. An electrical latent image is created on the member with electrostatic charge having a density sufficient to cause migration of the marking material from the migration layer through the migration layer -- softenable layer interface and into the softenable layer. When the migration layer and softenable layer comprise materials sufficiently dissimilar so as to retard or prevent penetration, the softenable layer is a circulation layer, the circulation of which enables penetration of the interface by marking material. In a multiple migration layer member, the migrated marking particles have their relative positions inverted.

Abstract: A method of forming a hydrophobic surface is disclosed. The method comprises coating a substrate surface with a stable aqueous colloidal solution, formed by a controlled hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof. The coated surface is then exposed to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render exposed surface regions hydrophobic.

Abstract: Record material useful for carbonless copying systems and the like and adapted to develop distinctive coloration on contact with a preferably colorless dye precursor reactive in an electron donor-acceptor color-producing mechanism, characterized by a thin, uniform surface coating containing smectite clay having its molecular structure chemically modified to impart substantially Newtonian viscosity behavior to aqueous suspensions thereof. On examination by X-ray diffraction, the chemically modified clay preferably exhibits a discernible peak at a characteristic angle of diffraction. Chemical modification is preferably achieved by contacting the clay with the acid, such as sulfuric acid, for a time sufficient to irreversibly alter the clay structure. Such clay coatings can be applied by the usual coating techniques and produce dye images of substantially improved resistance to fading by light and ordinary atmosphere.

Abstract: A color-forming composition and recording sheets embodying the composition are disclosed, wherein the color-forming composition comprises: (a) a leuco dye, (b) an aromatic secondary amine or derivative thereof and (c) an organic solvent.

Abstract: This invention provides a novel recording sheet having improved developing ability and resistance to light irradiation and which can be produced easily and economically. A developer layer coated on a support of the recording sheet contains a reacted compound between an alkali metal salt of a phenol resin and a water soluble metallic compound.

Abstract: A temperature-responsive record material for use in a thermographic recording and reproducing apparatus comprising a supporting sheet carrying a single layer containing, as the temperature-sensitive composition, a mixture resulting by a dispersion of a basic chromogenic compound and of an acidic compound in a binder having as assential binding agent a latex or a mixture of a latex with a non-ionic cellulose ether.

Abstract: A method of forming a hydrophobic surface is disclosed. The method comprises coating a substrate surface with a stable aqueous colloidal solution, formed by a controlled hydrolysis and nucleation reaction, comprising insoluble hydrous oxide particles of an element selected from Be, In, Cr, Fe, Co, Ni, Tl, Cu, Zn, Sn and mixtures thereof. The coated surface is then exposed to a source of ultraviolet radiation having a wavelength ranging from 1800A to 3300A to render exposed surface regions hydrophobic.

Abstract: Process for forming images by heating, imagewise, to a temperature above a softening temperature, but below the thermal decomposition temperature, a solid layer of a mixture of a thermoplastic, amorphous, organic polymer and a liquid plasticizer therefor, the mixture being capable of existing in a metastable state and a stable state for a period sufficient to convert the stable polymer to the metastable state, heating the entire surface of the layer to a temperature between the softening temperature of the stable and metastable states, and converting the softened exposed image areas to a visible image by applying finely divided colored particles to the layer and removing them from nonexposed areas or by thermal transfer. The simple procedure is a dry process, and images of high quality and stability are obtained rapidly.

Abstract: A pressure-sensitive copying paper comprising an adsorbent solid acid and a microencapsulated color former capable of forming a distinct color when reacted with the adsorbent acid coated on the same or a different surface of a support or supports, the microencapsulated color former being at least one lactone compound of a pyridine-carboxylic acid represented by the formula ##SPC1##Or a mixture thereof, wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and A are as defined hereinafter, is disclosed.

Abstract: A relatively uniform thin coating of a solid phenolic reactant can be applied to a paper base by contacting said paper base with a thin film of a solution consisting essentially of said phenolic reactant in a volatile organic solvent and immediately evaporating said solvent and, unexpectedly, said phenolic reactant is retained essentially completely on the contacted surface of the paper base. Thusly applied, it has been found that well defined colored marks are formed on the surface of the paper base on marking the surface with a colorless marking ink.

Abstract: A method of manifold copying using recording members having a dielectric surface on one side and surface of relatively lower resistivity on the opposite surface, which comprises forming a pack by placing sheet on sheet with the dielectric surfaces facing one way so that each dielectric surface excepting on one outer sheet is in contact with the lower resistivity surface of the next sheet, then placing the pack on a support with the lower resistivity surfaces on each sheet facing the support, then contacting the sheet further removed from the support with pressure imaging means, thereby to form a latent image on each dielectric surface, then separating the sheets of the pack and developing the latent image on each sheet by attracting thereto electroscopic marking particles.