Don got me thinking and is absolutely correct. I misread the Ritchie information and said the compasses contained alcohol. Wrong. Apparently Ritchie compasses are now filled with Isopar L, a "synthetic isoparaffinic hydrocarbon solvent" made by Exxon Mobil. According to Ritchie's website, they switched to this in 2001. A bit of research revealed that the Isopar family has a wide variety of uses as solvents for paints etc.
The freezing point of this Isopar Lis stated to be -60C, still well below any temperatures that most of us will encounter. Man, that crow has a taste.... Rich Knowles INDIGO LF38 Halifax, NS. On Nov 20, 2013, at 5:03 PM, Don Newman <donrnew...@gmail.com> wrote: More expensive compasses tend to use a mineral oil for greater dampening.
_______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
