- I have been using petrobond that I bought from BCS, and I've started
to take an interest in lost foam casting.
I guess what I'd like to know is where I can learn more about it, any
websites would be helpful, and can that be done in the petrobond?
- Catching up...
There is a recipe for a ceramic coating for foam parts somewhere in the
archives. It uses a certain kind of clay (can't remember which kind off
hand), water, elmer's glue, and dish soap. If you can't find it, I will dig
around for the recipe on my computer. Back when I was doing some casting
(now in an apartment), I used this and it worked great. The coating would
be a very thin black layer on the aluminum part when I pulled it out of the
sand, and it would flake off (usually I could just tap the part on the
ground and most would fall off). I can take a picture of one of the parts I
cast if anyone is interested in the surface finish, etc.
I used both white bead and blue score-board foam. The blue was much easier
to cut and get a good finish with. I was doing all this in loose sand box
sand vibrated to compact it around a part, but my 'vibrating' was just
shaking the flask.
> Am interested in your comment about a thin coat of plaster.... What
> happens to the plaster? Plaster doesn't burn, and it would seem that if