On Sat, 08 Oct 2005 10:41:24 -0700 Mark Goldes wrote Frank,
It might be extremely important not to use Serpentine. Here in California, at least, it contains Asbestos. Fine particulates of the latter, as you undoubtedly are aware, lodge in lung tissue. As many horrendous lawsuits testify, that is a substance to stay far away from in any such application. Mark Good point. I understand however that there is a form of Serpentine which does not contain asbestos. Hopefully, this is the one they used. Another point to be considered is that if the mineral is comminuted down to nano sized particles, any needle like character may be destroyed in which case even the asbestos containing Serpentines would not have the same effect on the lungs as blue asbestos, say. >From what I remember of my work on glass-fibre reinforced cement, the particle >size is critical. This is why glass fibres are not considered hazardous. >That's what the manufacturers claim, anyway (for what it's worth). Cheers, Frank
