Any reason not to make a reusable clay mold for shallow, open face casting (no undercuts)?
- Paul
open face casting in reusable clay mold
Moderator: Brad Walker
-
Paul Tarlow
- Posts: 344
- Joined: Sun Mar 09, 2003 4:06 pm
- Location: Helios Kiln Glass Studio - Austin
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Lauri Levanto
- Posts: 270
- Joined: Tue Mar 11, 2003 7:33 am
- Location: Halikko, Finland
I have done it several times, to make back reliefs.
The molds tend to be wide, so one must be carefull with drying and firing the mold.
I support the mold on pairs large of kiln brick wedges to
make it level and have enough support area.
In repetive work the separator is a problem.
In full fuse temps it is better to replace the kiln wask
after every fuse. Scaping off from a fine detail mold
is not fun. Instead of kiln wash I use 1-2 ratio
plaster and Al2O3. Maybe 1-4 is enough and parts off easier.
-lauri
The molds tend to be wide, so one must be carefull with drying and firing the mold.
I support the mold on pairs large of kiln brick wedges to
make it level and have enough support area.
In repetive work the separator is a problem.
In full fuse temps it is better to replace the kiln wask
after every fuse. Scaping off from a fine detail mold
is not fun. Instead of kiln wash I use 1-2 ratio
plaster and Al2O3. Maybe 1-4 is enough and parts off easier.
-lauri