On Fri, 31 Oct 2008 21:38:22 -0700 (PDT), Dar
wrote:

I need to make a bunch of molds in sandcast bronze and would like to
know the kind of sand
to get for finest detail/smoothest finish . They won't be complex , or
even 2 part sand molds, probably just bronze poured onto a flat cope
that has an depression in it and a dam built around the depression .

thanks

DS
I would consider plaster molds for best detail

see
http://www.modernsculpture.com/bronze.htm