Record material
AssigneeThe Standard Register Company
InventorTheodore Maierson
Life of this patent
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Abstract
A sensitized record sheet for developing useful color in oily, colorless, chromogenic dye-precursor inks applied thereto. Said record sheet is acid-reacting and bears a liquid ink comprising a non-evaporable liquid organic solvent having dissolved therein an acidic phenolic resin and a lower alkyl gallate.
Claims10
A record sheet sensitized with an acidic reactant for developing a color in an oily printing liquid containing a colorless, basic, chromogenic dye-precursor applied thereto by expression of droplets retained by pressure-rupturable wall material located in the sensitized sheet or in an overlying sheet placed against the sensitized sheet, wherein at least one surface of the sensitized sheet bears a substantially colorless, liquid ink comprising an acidic phenolic resin and a lower-alkyl gallate with both the resin and the gallate dissolved in a liquid organic solvent having a boiling point above 300.degree. C and a vapor pressure at 100.degree. C of 1 mm. of mercury or less.
In a method of making a mark on a record sheet by applying an oily, colorless, basic chromogenic ink to a sensitized surface of the record sheet, the improvement wherein the sensitized surface of the record sheet bears a substantially colorless liquid ink comprising an acidic phenolic resin and a lower-alkyl gallate dissolved in a liquid organic solvent having a boiling point above 300.degree. C and a vapor pressure at 100.degree. C of 1 mm of mercury or less.
Dependencies are inferred from the claim text.