XEROGRAPHIC CARBONLESS PAPER
Original Publication Date: 1988-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Carbonless paper sheets wherein the surface of one sheet is coated with capsules containing a color former in a solvent and the surface of another sheet in contact with the first sheet is coated with a color developer coating, as shown in Figure I, can cause contamination problems in xerographic imaging devices. Self-contained carbonless paper sheets combine both the color forming capsules and the color developing material in a single coating, as shown in Figure 2. Carbonless papers similar to those of Figure 2 and comprising a substrate with a coating containing both the color former and color developer material and with a polymeric transparent overcoating such as a transparent binder or an extruded thin layer of plastic film over the color forming layer, as shown in Figure 3, reduce or eliminate contamination of xerographic imaging devices into which these papers have been incorporated. Suitable materials for the transparent overcoat, which can be applied by conventional roll or blade coating methods, include aqueous emulsions of acrylic resins or solutions of acrylic or vinyl resins in organic solvents.