Rudy Tucker on sun 31 oct 04
Kate and Jeanne (in particular) and All,
Well, I finally have some reasonably decent photos of my cone 04 glaze =
tests. You can view them at =
http://pg.photos.yahoo.com/ph/rdy_tckr/album?.dir=3D/e148 . Descriptions =
included here because of the lack of space at Yahoo Photos. Color on the =
photos should not taken as exact. Rather, the pattern change in the =
tiles shoud be considered in realation to materials being increased or =
decreased. Use these as guides only not absolutes and as always--- do =
your own testing!=20
Poplar Forest+Frit 3110
A=3D PF Clay 5%/ Frit 3110 90%/ Bentonite 5%=20
B=3D PF Clay 15%/ Frit 3110 80%/ Bentonite 5%
C=3D PF Clay 25%/ Frit 3110 70%/ Bentonite 5%
D=3D PF Clay 35%/ Frit 3110 60%/ Bentonite 5%
E=3D PF Clay 45%/ Frit 3110 50%/ Bentonite 5%
F=3D PF Clay 55%/ Frit 3110 40%/ Bentonite 5%
These are made using a "local" clay that was given to me by the =
archeologist at Poplar Forest which was Thomas Jefferson's second home. =
Note the fluxing power of the frit as it is increased from F to A. Its a =
very basic glaze- clay plus flux. Bentonite aids in glaze suspension and =
raw fit in my green glazing. Try your own local clay.=20
Redart+Ball+Frit GF152
A=3DRedart 25%/ Ball Clay 5%/ Frit GF152 70%
B=3DRedart 20%/ Ball Clay 10%/ Frit GF152 70%
A=3DRedart 15%/ Ball Clay 15%/ Frit GF152 70%
A=3DRedart 10%/ Ball Clay 20%/ Frit GF152 70%
E=3DRedart 5%/ Ball Clay 25%/ Frit GF152 70%
Another simple glaze mix using commercially availible red clays. Ball =
clay used here for some of the same reasons that bentonite was use in =
glaze above.
=20
Redart+Frit GF152+Bentonite
A=3D Redart 10%/ Frit GF152 90% Add 5% Bentonite
B=3D Redart 15%/ Frit GF152 85% Add 5% Bentonite
C=3D Redart 20%/ Frit GF152 80% Add 5% Bentonite
D=3D Redart 25%/ Frit GF152 75% Add 5% Bentonite
E=3D Redart 30%/ Frit GF152 70% Add 5% Bentonite
F=3D Redart 35%/ Frit GF152 65% Add 5% Bentonite
Slip+Mason Stain #6405
This is a white slip,any should due, with increasing amounts of stain. A =
has 1/2% stain, B has 1%, C has 11/2% and so on up to H with 4%.
Kate, this set could be of most interest to you at the present. Coloring =
the slip rather than the glaze. You can use your premixed glaze this =
way.=20
Various
Top Row is a clear glaze with increasing 2% increments of Mason #6405. A =
has 2% up to E with 10%
Bottom Row
First three same clear glaze with with increasing increments of iron =
oxide 1%, 3%, and 5%. Fourth tile has 5% manganese carbinat. Fifth tile =
is 3.75% #6405 stain and 1.125% iron oxide.
Wash
These are washes made up of gerstly borate and various carbinates =
(copper, manganese and vanadium) and combinations of them. Wash was =
applied over a clear glaze over white slip. =20
Hope some of this helps,
Rudy
Wood Jeanne on sun 31 oct 04
Rudy, thank you!
You made some very impressive test trials here.
In particular the:
> Redart+Frit GF152+Bentonite
>
> E= Redart 30%/ Frit GF152 70% Add 5% Bentonite
> F= Redart 35%/ Frit GF152 65% Add 5% Bentonite
looks considerably like the lead-based glazes I'm
looking for.
I'm trying to duplicate faux lead look at cone 5, so
my mileage will vary.
Jeanne W.
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Kate Johnson on sun 31 oct 04
Rudy, how wonderfully helpful and generous of you!
Kate and Jeanne (in particular) and All,
Well, I finally have some reasonably decent photos of my cone 04 glaze
tests. You can view them at
http://pg.photos.yahoo.com/ph/rdy_tckr/album?.dir=/e148 . Descriptions
included here because of the lack of space at Yahoo Photos. Color on the
photos should not taken as exact. Rather, the pattern change in the tiles
shoud be considered in realation to materials being increased or decreased.
Use these as guides only not absolutes and as always--- do your own testing!
Planning to, and will share results as you have, with a separate Yahoo
album! The learning curve is a b**ch, but I'm too stubborn to give up.
The Poplar Forest/frit stuff in the first pic really appeals to me...it's
slightly crude, organic, yummy...
So are these all raw glazed, as we had talked about before?
I notice one of your recipes includes gerstley, which I have a bit of on
hand--good place to start my mixing explorations, I expect!
> Slip+Mason Stain #6405
This is a white slip,any should due, with increasing amounts of stain. A has
1/2% stain, B has 1%, C has 11/2% and so on up to H with 4%.
Kate, this set could be of most interest to you at the present. Coloring the
slip rather than the glaze. You can use your premixed glaze this way.
You mention that the color in the photos isn't quite accurate--are any of
these tinted slip samples more honey than daffodil? Would adding
more/different mason stain make it possible to get a more amber color? I
was talking to my potter friends/teacher about the mason stain/slip idea
yesterday, and he wasn't sure our supplier had many choices. The mason
stain yellow on hand at school is pretty wimpy...
By the way your timing is EXCELLENT, and thank you! We're getting an order
shipped to class and I can piggyback on it to try out some different things.
Why NOT mix my own glazes?!
Gratefully (and inspired to Go Forth and Court the Glaze Dragon Again!)
Kate
Tig Dupre on mon 1 nov 04
Rudy,
Wonderful test tiles, and good information. Many thanks for sharing your work.
One question: What is Frit GF152? I looked at Frank Gaydos' Frit Substitution Chart
and can't find a reference to GF152. Is it a high-alkaline, high-boron, high-calcia
frit... Wha-a-az-z-z-at?
Thanks again, Rudy,
Tig Dupre
in colorful Port Orchard, Washington, USA
Rudy Tucker on tue 2 nov 04
Tig,
G152 is a frit that I purchase from Campbell's Ceramic Supply in Richmond,
VA.
Their catalog lists it as a substitute for Ferro 3124. I was given the
following composition for it-
K2O .72
Na2O 6.5
CaO 14.09
Al2O3 10.0
B2O3 14.41
SiO2 54.29
Looks like high calcia. Since you looked at the test tiles, where do you
think the
bluish tint comes from in A & B tiles of the Redart+Frit GF152+Bentonite
set? In case you did not save it, here it is again
http://pg.photos.yahoo.com/ph/rdy_tckr/album?.dir=/e148
Thanks,
Rudy
----- Original Message -----
From: "Tig Dupre"
To:
Sent: Monday, November 01, 2004 9:49 AM
Subject: Re: Redware Ramblings/Test Tiles
> Rudy,
>
> Wonderful test tiles, and good information. Many thanks for sharing your
work.
>
> One question: What is Frit GF152? I looked at Frank Gaydos' Frit
Substitution Chart
> and can't find a reference to GF152. Is it a high-alkaline, high-boron,
high-calcia
> frit... Wha-a-az-z-z-at?
>
> Thanks again, Rudy,
>
> Tig Dupre
> in colorful Port Orchard, Washington, USA
>
>
____________________________________________________________________________
__
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melpots@pclink.com.
Kate Johnson on tue 2 nov 04
Bottom Row
First three same clear glaze with with increasing increments of iron oxide
1%, 3%, and 5%. Fourth tile has 5% manganese carbinat. Fifth tile is 3.75%
#6405 stain and 1.125% iron oxide.
Hi again Rudy and list...I'm curious as to which iron oxide...would any do?
I have red iron oxide on hand, and also ochre. Would one over the other be
more likely to give me a transparentish amber, or is there another option I
should try?
Best--
Kate
Kate Johnson on sun 19 dec 04
Hi Rudy and list...
Back to your post of Sunday, October 31, 2004 6:56 AM in answer to my
"Redware Ramblings/Test Tiles"
Now that I know a WEE bit more, more questions arise, from you or from
anyone...
I'm looking at your cone 04 glaze tests at
http://pg.photos.yahoo.com/ph/rdy_tckr/album?.dir=/e148 again...
You wrote, of the first set, upper left:
Poplar Forest+Frit 3110
A= PF Clay 5%/ Frit 3110 90%/ Bentonite 5%
B= PF Clay 15%/ Frit 3110 80%/ Bentonite 5%
C= PF Clay 25%/ Frit 3110 70%/ Bentonite 5%
D= PF Clay 35%/ Frit 3110 60%/ Bentonite 5%
E= PF Clay 45%/ Frit 3110 50%/ Bentonite 5%
F= PF Clay 55%/ Frit 3110 40%/ Bentonite 5%
These are made using a "local" clay that was given to me by the archeologist
at Poplar Forest which was Thomas Jefferson's second home. Note the fluxing
power of the frit as it is increased from F to A. Its a very basic glaze-
clay plus flux. Bentonite aids in glaze suspension and raw fit in my green
glazing. Try your own local clay.
---
So, my question includes my previous one on whether or not Frit 3110 is lead
free, and also curious as to what color the PF clay is. Is it a red
earthenware/terra cotta type?
---
You also wrote:
Slip+Mason Stain #6405
This is a white slip,any should due, with increasing amounts of stain. A has
1/2% stain, B has 1%, C has 11/2% and so on up to H with 4%.
Kate, this set could be of most interest to you at the present. Coloring the
slip rather than the glaze. You can use your premixed glaze this way.
---
Still trying this one, Rudy--so far the results have been pretty wuussy.
I keep meaning to call Mason to see if I can get a color chart--I wrote to
their contact address but received no answer. Sometimes the old fashioned
ways are best--pick up the phone!
Best--
Kate
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