On Sun, 4 Oct 1998, Gael Waiche wrote:

> The mist generators used in the special effects industry and
> at the disco are based on a radically different technology:
>
> They use a mixture of water and glycol (of course each
> manufacturer has its own secret receipe) that drips over
> an heated surface.

Not the ones I mean. The ones I mean are installed in decorative ponds of
floated on a lake to generate low-lying mist onto which laser light s(and
also normal beam lights) can project images such that the beam(s) are
visible.

Re: glycol, it's actually an oil and it's not very very healthy as far as
i can tell. I did service dubbing videos and U-matics that operate in a
large disco with oil-based mist and I have to say that the layer of gunk
inside the machines was millimeter thick, sticky, and stinking. Th
ewater-based mist is nothing to worry about, excepting corrosion and
electrics operated at 100% humidity.

Peter