KEMPB on sat 7 sep 96
Does anyone have a formula for a low expansion clay to go over stainless
steel mesh to be fired to Cone 7 or above ?????
Thanks.
Brian Kemp. Singapore
kempb@nievax.nie.ac.sg
vpitelka@Dekalb.Net on sun 8 sep 96
>Does anyone have a formula for a low expansion clay to go over stainless
>steel mesh to be fired to Cone 7 or above ????? - Brian Kemp. Singapore
Brian -
Rather than trying to come up with a clay with low-enough drying and firing
shrinkage, which would be damn near impossible, I would suggest something
more like a vitreous engobe or a refractory cement. The choice of which
would depend on what you wish to do with this "clay"-coated stainless mesh.
My students have done something of this sort in the past using A.P.Green
Greenpatch 421, an all purpose high-fire refractory cement which is very
versatile and inexpensive. Of course, I don't know what you have available
to you in Singapore. If you need more information you might consider
contacting Walter Hall at Hartford Art School (University of Hartford). He
has done work with refractory cement-coated mesh for years. Good luck.
- Vince
Vince Pitelka - vpitelka@Dekalb.Net
Phone - home 615/597-5376, work 615/597-6801
Appalachian Center for Crafts, Smithville TN 37166
Dannon Rhudy on sun 8 sep 96
>----------------------------Original message----------------------------
>>Does anyone have a formula for a low expansion clay to go over stainless
>>steel mesh to be fired to Cone 7 or above ????? - Brian Kemp. Singapore
>
>Brian -
>Rather than trying to come up with a clay with low-enough drying and firing
>shrinkage, which would be damn near impossible,
There is a recipe for zero-shrinkage clay in Cushing's Handbook; mine is in the
studio, however. I'll send the formula tomorrow.
Dannon Rhudy
LOWELL BAKER on mon 9 sep 96
good morning Brian:
I believe that you are going to have a lot of trouble placing clay on
any wire mesh because of the way the wire expands and contracts on
the heating and cooling cycles. Even the fondus that you are working
with will not work well with a wire core. If you must use a mesh try
to find one that spaces the wires an inch or so apart. This will
give you more clay strength than wire strength and the clay should
overcome the wiggley wire as it expands and contracts. Try
Fiberglass mesh or fish nets.
Jackson and I are making boomarangs. They come back to our feet but
do not float in like your's do. expect something in the mail from
Jackson; give John and Betty and Pam a hug for us and go to the food
place and eat something wonderful for us. We haven't found food
worth eating since we left Singapore.
Lowell
The University of Alabama
Richard P. Bonner on mon 9 sep 96
>----------------------------Original message----------------------------
>>Does anyone have a formula for a low expansion clay to go over stainless
>>steel mesh to be fired to Cone 7 or above ????? - Brian Kemp. Singapore
>
>Brian -
>Rather than trying to come up with a clay with low-enough drying and firing
>shrinkage, which would be damn near impossible, I would suggest something
>more like a vitreous engobe or a refractory cement. The choice of which
>would depend on what you wish to do with this "clay"-coated stainless mesh.
>My students have done something of this sort in the past using A.P.Green
>Greenpatch 421, an all purpose high-fire refractory cement which is very
>versatile and inexpensive. Of course, I don't know what you have available
>to you in Singapore. If you need more information you might consider
>contacting Walter Hall at Hartford Art School (University of Hartford). He
>has done work with refractory cement-coated mesh for years. Good luck.
>- Vince
>
>Vince Pitelka - vpitelka@Dekalb.Net
>Phone - home 615/597-5376, work 615/597-6801
>Appalachian Center for Crafts, Smithville TN 37166
How about the "no-shrink" body developed by Jerry Rothman...the recipe can
be found in a Ceramics Monthly published in the last couple of years.
RB
Susan Rather
Associate Professor of Art History
FAB 2.130
471-7757
Patrick & Lynn Hilferty on tue 10 sep 96
I may have this all wrong, but in bronze casting they use a process called
"shell casting" which might (big might) be adaptable. The process, as I
understand it, involves dipping a positive into a solution that includes
colloidal silica, until a shell is built up around it. This ceramic mold is
fired and bronze is poured in. I've been told that people have dipped metal
in and fired it on, but I've never done it myself and don't really know if
it's possible.
**************************************
Patrick Hilferty
E-Mail: philferty@earthlink.net
Web: Http://home.earthlink.net/~philferty/
**************************************
Dannon Rhudy on tue 10 sep 96
>----------------------------Original message----------------------------
VC Sculpture Body cone 04 - 6 Also add: Red Iron Ox
2
Narco Fire Clay 10 For more plasticity,
AP Green Fire Clay 10
Hawthorn 7 Macaloid
2
Lizella 3
Fibrous Wollastonite 15 More dry strength,
add nylon fiber
Coarse Grog 25
Medium Grog 5
Fine Grog 20
Calcined Alumina 5
Not very plastic, but can be modeled and shaped fairly well. not ZERO
shrinkage, but very low.
ZERO SHRINKAGE CLAY BODY:
50% coarse grog (4-16 mesh)
10% medium Grog (20-36 mesh)
40% fine grog (40-60 mesh)
Lightly coat these particles with a deflocculated clay slip. This slip
should have
no more than 25% water. (Think of a chocolate coated raisin)
Firmly pack into-around shape. The more firmly packed, the better.
Press clay into whatever voidss may be left in and around the particles.
Dry and fire ---zero shrinkage.
The mixture of coarse, medium, fine grog particles is critical to the body.
This is the standard used by industry in making heavy refractories where
minimum shrinkage is critical.
(From Cushing Handbook).
Dannon Rhudy
Dannon Rhudy on wed 11 sep 96
>----------------------------Original message----------------------------
>>----------------------------Original message----------------------------
>
>VC Sculpture Body cone 04 - 6
I see that the formula garbled a bit in transmission; it should read:
Red Iron 2
Macloid 2
Dannon
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