[TheForge] Chip forges again

[Bruce Freeman]

Hmmm,... well I never expected you to COOK the rice first.  Still, rice
was only one possibiity.  Coffee grounds isn't a bad notion.  Cheap. 
Available.  Coarse corn meal, soaked overnight, might work too.

Checking of ceramics can be reduce by adding crushed fired ceramic to
the mix.  Then the wet ceramic glues the mess together, without much
shrinking possible.  

Bruce

>>> frosty at customcpu.com 4/1/2006 12:17:25 PM >>>
<snip>

I think using rice for the organic/burnout component didn't work as
well as 
I'd like, it is too resilient to ram up solidly. I have the same
complaint 
about perlite as well. It'd be different if I could use a wetter mix
but 
shrink checking as it dries is a factor with fireclay. I can ease the
shrink 
checking by increasing the cement ratio but then it starts to heat
spall.