Wes wrote:

I would have liked to try a dry ice and alcohol bath to make this stuff hard but no one
knew where I could get dry ice.


You can make your own, all you need is a CO2 cylinder with a dip tube,
or invert a non-dip tube cylinder. Run the liquid hose (get a Stainless
steel wrapped hose designed for liquid CO2, and be sure never to trap
the liquid in the line between valves) into a tightly built wood box
with a UHMW (or similar) lining. The hose should be run into a T
fitting with the side to the tank, bottom into the top of the box, and
top having an adjustable relief valve. Shoot small bursts of CO2 into
the box, each burst will create a layer of 'snow' and many layers will
pack into a solid brick. a 2x3x8 inch brick will be about a pound of
dry ice. Build the box so it can be easily unclamped to allow removal
of the CO2(s).

Stuart