On Sat, 21 Aug 2004 19:51:13 -0500, "Wolfgang" wrote:



Is there a mineralogist in the house?

No, but there IS guy whose family owns a silica mine...hydrophobic
(often treated with silicone oil - like copier oil) fumed silica should
have the properties of FF. The untreated variety should not as it is
hydrophilic. I can't remember where I heard it, but I do remember
hearing that FF is the treated stuff as is used in certain toner
formulations. FWIW, "Cab-O-Sil" isn't a specific product, it is a line
name, with various formulations in the line.

HTH,
R


Wolfgang
ain't science fun?