wjm (01/05/83)
Sorry about a bit of misinformation that I put in my article yeasterday about tape head cleaners ... the two safe compounds should be isopropyl alcohol and trichlorethane (there was an error in yesterdays 's article - trichlorethelyne should not be used since it is carhas been found to be carcinogenic). Tricholorethane is the active ingredient in Nortronics head cleaners. (Also , technically it is not Freon, since Ththeatat DuPont trademark applies only to halogenated hyrdrocarbons containing both chlorine and florinhurine). Thanks to Phil Karn and Len Kastner for calling my attention to the error. Bill Mitcchell (whuxk!wjm)