Brian Molanphy on thu 13 nov 03
vince wrote:
Repairing Greenware
1 - If there are gaps to fill or surfaces to build up, use paper clay
slurry - shred a tight handful of toilet paper pulp in water in a =
blender,
squeeze it out, mix it with vinegar and a heaping cup of dry powdered
claybody to thick slurry consistency. Mosten broken surfaces with =
vinegar
before attaching parts with paperclay slurry. This slurry does not =
store
well, because the paper fibers will rot. Mix in small batches to be =
used
quickly...
Repairing Bisque Ware
Paper clay slurry still works. ...
vince, what about using a base (like sodium silicate + soda ash) instead
of an acid (vinegar)?
could one be subbed for the other (at appropriate solution =
concentration)
in paper clay and for other deflocculation purposes? -brian
Vince Pitelka on thu 13 nov 03
Brian wrote -
"vince, what about using a base (like sodium silicate + soda ash) instead
of an acid (vinegar)?
could one be subbed for the other (at appropriate solution concentration)
in paper clay and for other deflocculation purposes? -brian"
One could do that, but I would wonder why? A flocculant (vinegar) makes the
particles attract one another, while a deflocculant (sodium silicate or soda
ash) makes the particles repel one another, which doesn't seem to be
something you would want in a joining slip. But then, Lana Wilson's magic
water works great for joining wet clay. I'd say go ahead and do some
experiments and report back to us.
Best wishes -
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Home - vpitelka@dtccom.net
615/597-5376
Office - wpitelka@tntech.edu
615/597-6801 x111, FAX 615/597-6803
http://iweb.tntech.edu/wpitelka/
http://www.tntech.edu/craftcenter/
| |
|
