gina mars on fri 12 aug 11
Hi All, I was going to try a naked raku recipe but I do
not have lincoln fire clay. I have ap green and hawthorne. can I substitute
the fire clay? What is the difference?
Gina Mars
www.marspottery.net
A perfect weather day in New York
William & Susan Schran User on fri 12 aug 11
On 8/12/11 3:09 PM, "gina mars" wrote:
> Hi All, I was going to try a naked raku recipe but I do
> not have lincoln fire clay. I have ap green and hawthorne. can I substitu=
te
> the fire clay? What is the difference?
With naked raku one needs to find the clay for the slip that "fits" - in
this case fitting the situation is where the slip comes off fairly easily
after firing.
I would go forward and make a batches using fireclays and see if there is
any difference.
I'm beginning to believe perhaps the best naked raku slip recipe probably
begins using the clay that made the pot.
I also suggest you fire no hotter than 1500F.
Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
David Woof on mon 15 aug 11
Hi Gina=3D2C
Lincoln is cheaper=3D2C of finer mesh and dirtier (higher iron content) Is =
th=3D
is true? Google it. (I'm always encouraging self education and research to =
=3D
augment what we are told or taught)
The Iron content won't matter at your raku temps which should be 200-300 de=
=3D
grees f below your regular raku temps to avoid fusing the Naked mixture to =
=3D
your pot. If you also glaze inside or outside parts for glaze embellishment=
=3D
s in conjunction with the naked effects you may need to adjust down the mat=
=3D
uration temp of these glazes as well. Though you may well discover and enjo=
=3D
y some interesting effects under firing these glazes....etc.
So just try all the fire clays=3D2C ball clays=3D2C and kaolins and see wha=
t co=3D
mes up. =3D20
Last year one of my students "mistakenly" applied our studio kiln shelf was=
=3D
h for naked raku=3D2C then again "mistakenly" slipped the pieces into a reg=
ul=3D
ar Raku firing and was chagrined until the stuff readily peeled off and the=
=3D
the results were phenomenal.=3D20
What ever you chose to do you need the naked formulation to sinter but not =
=3D
fuse. Several naked recipe compositions out there resemble dry under fired =
=3D
glazes at their specified temps=3D2C so are more sensitive to over firing a=
nd=3D
consequent fusing.
=3DA0Don't make it all to precious. Shoot from the hip sometimes!!!
=3DA0The kiln wash: (John Britt)
=3DA025 EPK
=3DA025 calcined EPK
=3DA050 Alumina Hydrate
=3DA0__________
=3DA01.5% G-200 feldspar =3DA0 =3DA0=3DA0 (I'm sure any of the potash f=
eldspars=3D
would serve the purpose)
Best=3D2C
David Woof
Short Story: "Shooting from the Hip" =3DA0 A Granny of the family I Knew Wa=
s =3D
insisting to go out Deer hunting for the first time.=3DA0 Her Family gave h=
er=3D
basic instructions on the strategy and handed her an old 12 gauge break ac=
=3D
tion single shot loaded with a slug.=3DA0 Believing she had "no chance in h=
el=3D
l" they left her standing out of harms way but in a likely enough spot. No =
=3D
other ammo except the slug in the chamber.
So she is standing there taking in the sights and sounds of a November morn=
=3D
ing in the Northwoods when a deer just appears in front of her about 25 fee=
=3D
t away. Deer do that when they sense your attention is else where. So Grann=
=3D
y Fran=3D2C with gun idlely hanging at arms length at her side points and s=
qu=3D
eezes the trigger. Deer drops.=3DA0 If my memory serves after 40 years=3D2C=
she=3D
was the only one in that family who brought home meat that year. Or usuall=
=3D
y any year!!! True story.
My Dad used to guide deer hunting members of that family but they were as u=
=3D
ntrainable as a sheep dog for retrieving cold water ducks. In fact one of t=
=3D
heir big stumbling stones they never got over was that they tried to "lead"=
=3D
a trotting deer at 75 feet like they would a fast flying duck at 40 yards.=
=3D
=3DA0 Shooting a .30 cal with ballistics of 2200 feet per second a foot(12"=
)a=3D
head of a deer is just shooting a foot ahead of a deer. I remember=3D2C as =
a =3D
child=3D2C digging from a vein of fire clay in the creek bank down near whe=
re=3D
Fran shot her deer.
=3DA0______________________________________________________________________=
__
=3DA011a. Naked Raku Fireclay Question
=3DA0Posted by: "gina mars" gmarsraku@VERIZON.NET
=3DA0Date: Fri Aug 12=3D2C 2011 1:25 pm ((PDT))
=3DA0not have lincoln fire clay. I have ap green and hawthorne. can I subst=
it=3D
ute
=3DA0the fire clay? What is the difference?
=3DA0Gina Mars
=3DA0www.marspottery.net
=3DA0A perfect weather day in New York
=3D
June on mon 15 aug 11
Gina,
Lincoln is a more plastic fireclay which is probably why it was recommended=
=3D
by Riggs. You might try it with a regular fireclay and try one test adding=
=3D
2% bentonite of the fireclay amount to see if that will work better.
Warm regards,
June
http://wwww.shambhalapottery.blogspot.com
http://groups.yahoo.com/group/sodasaltfiring/
http://www.shambhalapottery.com
----- Original Message -----
From: David Woof
To: Clayart@LSV.CERAMICS.ORG
Sent: Mon, 15 Aug 2011 08:32:27 -0000 (UTC)
Subject: Re: Naked Raku Fireclay Question
Hi Gina,
Lincoln is cheaper, of finer mesh and dirtier (higher iron content) Is this=
=3D
true? Google it. (I'm always encouraging self education and research to au=
=3D
gment what we are told or taught)
The Iron content won't matter at your raku temps which should be 200-300 de=
=3D
grees f below your regular raku temps to avoid fusing the Naked mixture to =
=3D
your pot. If you also glaze inside or outside parts for glaze embellishment=
=3D
s in conjunction with the naked effects you may need to adjust down the mat=
=3D
uration temp of these glazes as well. Though you may well discover and enjo=
=3D
y some interesting effects under firing these glazes....etc.
So just try all the fire clays, ball clays, and kaolins and see what comes =
=3D
up. =3D20
Last year one of my students "mistakenly" applied our studio kiln shelf was=
=3D
h for naked raku, then again "mistakenly" slipped the pieces into a regular=
=3D
Raku firing and was chagrined until the stuff readily peeled off and the t=
=3D
he results were phenomenal.=3D20
What ever you chose to do you need the naked formulation to sinter but not =
=3D
fuse. Several naked recipe compositions out there resemble dry under fired =
=3D
glazes at their specified temps, so are more sensitive to over firing and c=
=3D
onsequent fusing.
=3DC2=3DA0Don't make it all to precious. Shoot from the hip sometimes!!!
=3DC2=3DA0The kiln wash: (John Britt)
=3DC2=3DA025 EPK
=3DC2=3DA025 calcined EPK
=3DC2=3DA050 Alumina Hydrate
=3DC2=3DA0__________
=3DC2=3DA01.5% G-200 feldspar =3DC2=3DA0 =3DC2=3DA0=3DC2=3DA0 (I'm sure=
any of the pota=3D
sh feldspars would serve the purpose)
Best,
David Woof
Short Story: "Shooting from the Hip" =3DC2=3DA0 A Granny of the family I Kn=
ew W=3D
as insisting to go out Deer hunting for the first time.=3DC2=3DA0 Her Famil=
y ga=3D
ve her basic instructions on the strategy and handed her an old 12 gauge br=
=3D
eak action single shot loaded with a slug.=3DC2=3DA0 Believing she had "no =
chan=3D
ce in hell" they left her standing out of harms way but in a likely enough =
=3D
spot. No other ammo except the slug in the chamber.
So she is standing there taking in the sights and sounds of a November morn=
=3D
ing in the Northwoods when a deer just appears in front of her about 25 fee=
=3D
t away. Deer do that when they sense your attention is else where. So Grann=
=3D
y Fran, with gun idlely hanging at arms length at her side points and squee=
=3D
zes the trigger. Deer drops.=3DC2=3DA0 If my memory serves after 40 years, =
she =3D
was the only one in that family who brought home meat that year. Or usually=
=3D
any year!!! True story.
My Dad used to guide deer hunting members of that family but they were as u=
=3D
ntrainable as a sheep dog for retrieving cold water ducks. In fact one of t=
=3D
heir big stumbling stones they never got over was that they tried to "lead"=
=3D
a trotting deer at 75 feet like they would a fast flying duck at 40 yards.=
=3D
=3DC2=3DA0 Shooting a .30 cal with ballistics of 2200 feet per second a foo=
t(12=3D
")ahead of a deer is just shooting a foot ahead of a deer. I remember, as a=
=3D
child, digging from a vein of fire clay in the creek bank down near where =
=3D
Fran shot her deer.
=3DC2=3DA0_________________________________________________________________=
____=3D
___
=3DC2=3DA011a. Naked Raku Fireclay Question
=3DC2=3DA0Posted by: "gina mars" gmarsraku@VERIZON.NET
=3DC2=3DA0Date: Fri Aug 12, 2011 1:25 pm ((PDT))
=3DC2=3DA0not have lincoln fire clay. I have ap green and hawthorne. can I =
subs=3D
titute
=3DC2=3DA0the fire clay? What is the difference?
=3DC2=3DA0Gina Mars
=3DC2=3DA0www.marspottery.net
=3DC2=3DA0A perfect weather day in New York
=3D20
| |
|
