HOW TO MAKE YOUR OWN SELF-HARDENING CLAY
How to use two simple ingredients to make your
own self hardening clay.
technique is given in both the Castcraft
Guides and the Castcraft
Moldmaking Video, but it is valuable enough to
mention again: By adding ordinary kitchen baking flour to
plaster, you can make the plaster into a "self-hardening
clay" type material.
are just a few things you can do with it:
sculpture you can work by hand or tools for hours.
Then in 24 hours it will harden and your sculpture
will be permanent. But you can still carve and sand
the material as a spackle to repair defects or fill
holes in a model. You can press it into place and it
will stick. 24 hours later it will be hard and
it to make "walls" or "containers" to surround a model
you will be making a mold of. Just form the material
into any shape you need. 24 hours later you will have
a mold box, more permanent than clay.
your own custom, reusable, mold box walls: Roll the
material (see this tip)
to a thickness of 1/2 inch to 3/4 inch, then cut into
strips as wide and long as you need. 24 hours later
you will have a set of permanent plaster "walls" to
surround a model and make a mold box.
Here's how to make the self-hardening clay:
mix an ordinary batch of pottery plaster. Then, while
stirring, add as much flour as it takes to turn the
plaster into a stiff clay-like material. To use the
material, take as much as you need and knead it in your
hands for a while until it is very well-mixed and
uniform. Then form it into any shape you want. It will
have a workable time of at least a couple of hours. It
will be completely hard within 24 hours.
that this material is still plaster! To avoid
plugging up your plumbing, don't wash your hands or
tools in a sink - use a wash bucket or outside faucet!
a PDF source list
Includes 26 suppliers of all mold making and
casting materials mentioned in ALL the demonstrations on
this web site, including silicone rubber, polyurethane
rubber, latex rubber, polyurethane plastic, epoxy resin,
polyester resin, molding clay, foam board, release
agents, pottery plaster, Hydrocal, metal powders, other
plastic resin fillers, and gelatin molding compound.
With company names, addresses, phone numbers, and web
sites. Downloads to your computer as a PDF file.