Word: carbonless
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...also plenty of hazardous vapors. Says Chemist Gray Robertson, whose company in Fairfax, Va., has surveyed nearly 250 structures for foul indoor air: "The public tends to mistake tobacco smoke -- the only visible indoor contaminant -- for all pollution." Less readily detected are irritating fumes from copier-machine liquids, carbonless paper, paint, rugs, draperies, wall paneling and cleaning solvents. Many contain formaldehyde, which can cause nausea, rashes and menstrual irregularities. Ventilators also spew forth illness-causing bacteria and mold; such organisms find fertile breeding ground in air-conditioning and heating systems that are often turned off at night and on weekends...
...Carbonless Paper. Microencapsulation was first used by the National Cash Register Co. in 1954 as a means of producing carbonless copying paper. One sheet of paper was coated on the back with a layer of microscopic capsules containing one chemical; the copy sheet was coated on the front with another chemical. When the two pieces were inserted in a typewriter or Teletype machine, the force of the keys hitting the top sheet broke the capsules, releasing the chemicals they contained. While the typewriter ribbon supplied ink for letters on the top sheet, the combined chemicals made an inklike copy...
...carbonless paper quickly caught on, and now brings N.C.R. more than $25 million a year. But N.C.R. scientists saw no reason to settle for that one payoff from encapsulation. They, and researchers for other companies, have been busy working out countless other applications. Among the most familiar: "timed release" decongestants such as Contac, and a newly introduced aspirin called Measurin...
N.C.R.'s restless research has brought some exciting new inventions, such as a carbonless carbon paper (chemically coated sheets that reproduce type on impact). While working on this, N.C.R. discovered a method of enclosing liquid in microscopic gelatin capsules, thus making a liquid look and act like a solid. So treated, castor oil becomes tasteless-because it is covered with gelatin. More than 1,000 companies are investigating the process to see if it can be used for their own products, and the Pentagon has contracted with National to "encapsulate" liquid rocket fuel so that it will pack...
...Carbonless Copies. A treated paper for making multiple copies of business forms without using carbon inserts has been developed by National Cash Register...
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