2.5 Forms Production
CCP is converted into forms for a variety of applications—for example, business forms, invoices, computer paper, and Telex rolls. This process is normally performed by printers with appropriate forms design using conventional printing inks as well as specialized desensitizing inks. The latter are applied to the CF surface to prevent the color former from developing into an image on certain areas of the paper [AEMCP 1985].
CCP may be collated into business form sets that are glued along one edge. The glues (called edge-padding, edge-tipping, or "fanapart" glues) are similar to those used for ordinary paper writing pads. Manifold forms using pressure-sensitive CCP are produced using conventional printing press techniques. For some applications, the production of the multipart form by photocopying or laser printer operations is preferred—especially in short-run for production, emergencies, and experimental or individualized forms. The manifold forms are bound with an adhesive containing gum resins such as abietic acid. More recently, Moore Business Forms, Inc., was granted a patent [McIntyre and Greig 1989] for the use of a repositionable adhesive pad on the CF (such as is found on money wrappers). Bodmer and Peters [1984] and Bodmer and Miller [1985, 1986] noted that CF coating components can accumulate on the heated fuser roll of the copier or the laser printer, which becomes tacky and can lead to poor copy quality. A phenolic polymeric film material, diolefmic alkylated or alkenylated cyclic hydrocarbons (cyclic terpene derivatives such as limonene), and/or an oil-soluble metallic salt (primarily zinc) of a phenol-formaldehyde novolak resin can be used to overcome the fuser roll contamination problem, which may or may not result in slower print speeds.
2.6 Other Forms and Variations of CCP Technology
Forms sometimes combine CCP with carbon paper to become a "two-write" system [Mead Corporation 1992]. The Branch Safety Council for Offices and Administrations [1988] also reported on another type of CCP that is pressure sensitive and is called "mechanical" paper. The CB sheet is coated with zinc chloride and covered by a thin layer of wax. Pressure created on the top side of the form causes the zinc chloride to break through the wax and adhere to the sheet below that is coated with an absorbing layer of color generators, polyvinyl acetate, and clay. The Mead Corporation was granted a patent that incorporated a micro-encapsulated, photosensitive material that cured to a stable image when heat-activated in the presence of a developer such as an organic peroxide [Sanders 1984]. The Mead Corporation was also granted a patent on a novel system that uses a self-contained imaging sheet to produce images on plain paper using a photosensitive[1], photocurable, image-forming agent and a developer material on the surface of the paper support [Feldman et al. 1994].
The NCR Corporation (formerly the National Cash Register Company) was granted a patent [Marinelli 1985] for the addition of an aqueous wax emulsion to the CB coating to act as a barrier between the reactants in the CB coating and in the CF coating in multiple-copy printing operations. The technology prevents precolor formation caused by reactants seeping into the CF and can withstand on-press CF coating (presumably with desensitizing inks). Formulations included the use of JonwaxTM 120 (an emulsion of polyethylene and paraffin wax), Jonwax 26 (a wax emulsion of polythene wax), and Jonwax 22 (a water-based wax compound).
- ↑ "Actinic radiation," including the entire electromagnetic spectrum.
