Gordon Ward on tue 20 sep 05
Hi Mel,
I've used the 4x25 + 2% bent. for many years. For a number of years we
made stencils from newsprint and applied slip to bone dry ware. The
slips were colored with a variety of oxides and needed to go on pretty
thick to be opaque. We deflocuated the slip with a bit of Darvan 7.
This made the slip fluid with less water. The slip was exactly the
same as the body (except for the oxides and Darvan 7). With this slip,
however, if you went much past 1/16" you would get a craze pattern. If
you are going on leather hard you might be able to get away with
deflocutating but I haven't tried it. Definitely not with a freshly
thrown form. It will turn the whole thing into a puddle. In my
experience though, the equal parts slip works pretty well "as is" on a
freshly thrown piece.
Check out these pots by Richey Bellinger:
http://www.richeybellinger.com/photos/photos.html I went to a workshop
he gave a year or so ago where he demonstrated his slip work. His
decoration is created mostly from manipulated slip on freshly thrown
pieces. As I recall it was a slip of the same body. The clever part
was that he first applied the slip using a horse syringe behind a flat
brush on the rotating pot. This is a nice way to get a lot of slip on
in a controlled way. He then used a rib on the slowly rotating piece
to create pattern. Did some nice patterns on plates too.
Have fun,
Gordon
On Sep 20, 2005, at 5:18 PM, mel jacobson wrote:
> this is a standard white/porcelain recipe.
> pounds, volume, percent.
>
> 25 epk
> 25 silica
> 25 feldspar
> 25 ball clay
>
> this is one of those theories that drive purists nuts.
> atomic weights etc change....but, in the long run
> you can almost always get a nice white high temp
> body with this theory.
> it is very white.
> and, throws well.
>
John Rodgers on tue 20 sep 05
I take it this is a Cone 10 Porcelain??? Other???
Regards,
John Rodgers
Chelsea, AL
mel jacobson wrote:
> this is a standard white/porcelain recipe.
> pounds, volume, percent.
>
> 25 epk
> 25 silica
> 25 feldspar
> 25 ball clay
>
> this is one of those theories that drive purists nuts.
> atomic weights etc change....but, in the long run
> you can almost always get a nice white high temp
> body with this theory.
> it is very white.
> and, throws well.
>
> if you are fussy....do the percent thing.
>
> i make it by adding an ice cream pail of each into
> a large container. add water...mix.
> makes a great slip. seems to stick to most semi wet surfaces.
>
> i did read the archives. thick slip
> paper clay additions
> fine sieving
> adding calcined epk
> epsom salts
> vinegar.
> or, do all the above.
> and the japanese add a seaweed liquid. but, i don't have any of that.
> mel
> from mel/minnetonka.mn.usa
> website: http://www.pclink.com/melpots
> http://home.comcast.net/~figglywig/clayart.htm
> for gail's year book.
>
> ______________________________________________________________________________
>
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>
>
mel jacobson on tue 20 sep 05
this is a standard white/porcelain recipe.
pounds, volume, percent.
25 epk
25 silica
25 feldspar
25 ball clay
this is one of those theories that drive purists nuts.
atomic weights etc change....but, in the long run
you can almost always get a nice white high temp
body with this theory.
it is very white.
and, throws well.
if you are fussy....do the percent thing.
i make it by adding an ice cream pail of each into
a large container. add water...mix.
makes a great slip. seems to stick to most semi wet surfaces.
i did read the archives. thick slip
paper clay additions
fine sieving
adding calcined epk
epsom salts
vinegar.
or, do all the above.
and the japanese add a seaweed liquid. but, i don't have any of that.
mel
from mel/minnetonka.mn.usa
website: http://www.pclink.com/melpots
http://home.comcast.net/~figglywig/clayart.htm
for gail's year book.
L. P. Skeen on tue 20 sep 05
Now mel, you're just not thinking is all. You can make yer own seaweed goop
by going to the Asian market and getting some of that green stuff they use
to roll sushi and adding water. ;)
L
----- Original Message -----
From: "mel jacobson"
> and the japanese add a seaweed liquid. but, i don't have any of that.
Steve Irvine on wed 21 sep 05
On Tue, 20 Sep 2005 19:18:07 -0500, mel jacobson wrote:
>this is a standard white/porcelain recipe.
>pounds, volume, percent.
>
>25 epk
>25 silica
>25 feldspar
>25 ball clay
I also use this as my white slip on stoneware. For several years I used this recipe as the starting
point for a kind of porcelaineous stoneware. To the above I'd mix in an addition of 10-15 percent
fire clay (either PBX or Missouri) to make a body the threw well and was especially nice in salt and
wood firings.
Steve
http://www.steveirvine.com
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