Abstract: Disclosed is a pressure-sensitive recording material which comprises a support having thereon a two-layer microcapsule coating wherein the microcapsule layer adjacent to the support contains no color former. Such recording material makes possible a substantial decrease in quantity of color former required.

Abstract: A record member comprising a developer composition comprising a glass comprising a biphenol color developer and a resinous material is disclosed. These compositions are particularly useful as color developers for basic chromogenic material.

Abstract: A pressure-sensitive record material comprising the colorless chromogenic dye Pyridyl Blue mixed with and adsorbed onto a pigment which is coated on a substrate sheet, and capsules containing an acidic resin dissolved in a suitable solvent, the capsules being coated on the same or an additional sheet. This "reverse" system (where the acidic resin rather than the dye is encapsulated) provides an improved community of properties, including improved image strength, print stability (fade resistance) and resistance to degradation. Pyridyl Blue is a mixture of the isomers 7-(1-ethyl-2-methylindol-3-yl)-7-(4-diethylamino-2-ethoxyphenyl)-5,7-dihyd rofuro[3,4-b]pyridin-5-one and 5-(1-ethyl-2-methylindol-3-yl)-5-(4-diethylamino-2-ethoxyphenyl)-5,7-dihyd rofuro[3,4-b]pyridin-7-one.

Abstract: A sensitized record sheet material is disclosed, suitable for developing color in oily, colorless, chromogenic dye-precursor inks applied thereto. Said record sheet material has a light, reactive, coating which comprises a zinc compound and a salicylic acid derivative combinded in, and applied from, an aqueous system of basic pH. The coating composition is also disclosed, as is the process for making it.

Abstract: Record material is disclosed comprising paper sheet material coated with droplets of liquid wherein the liquid comprises 2,2,4-trimethyl-1,3-pentanediol diisobutyrate. Said liquid is associated on the record material with at least two color-producing reactants, at least one of which is soluble in said liquid. The liquid is associated with the reactants by either being in close proximity to both reactants or by having one of the reactants dissolved therein and being in close proximity to the other. Of the color-producing reactants, one is a chromogenic dye-precursor and one is a coreactant material capable of developing the color of the chromogenic dye-precursor when the two reactants are brought into reactive contact.

Abstract: A process of making a sensitized record sheet material is disclosed, suitable for developing color in oily, colorless, chromogenic dye-precursor inks applied thereto. Said record sheet material has a light, reactive, coating which comprises a zinc compound and a salicylic acid derivative combined in, and applied from, an aqueous system of basic pH. The coating composition is also disclosed.

Abstract: A colorless marking liquid comprising a vehicle in which is dissolved at least two colorless reactants each exhibiting its own distinctive color on reaction with an acidic record material sensitizing substance, the liquid yielding an apparent blue hue on record material sensitized with an acidic material. The resulting blue print provides excellent reproduction capabilities when copied by xerographic processes.

Abstract: A pressure-rupturable, liquid-droplet-containing microcapsule having walls of hydrophilic polymeric film-material such as gelatin wherein the liquid core-material is a water-immiscible oil having water dissolved therein together with additional material which is water-soluble such as a water-soluble colorless chromogenic dye-precursor material or color-developing reactant material.