Ababi on mon 27 oct 03
Hi!
I tried to read the book "Single firing" of Fran Tristram. In the
beginning I enjoyed- latter was too complicated, I mean, if I must read
a book with a dictionary, I give it up. It is a good book and I have got
the idea.
My question is to the PaperClayArters. May you give me hints about
single firing with paperclay?
Ababi, back to the list with the repaired computer.
LindaBlossom on mon 27 oct 03
Hello Ababi,
The only thing I do to make a glaze work since I only single fire and almost
always with paper clay, is add veegum to the glaze (1%) or cmc. Richard
Aerni also single fires and he adds bentonite to his glazes. You must sieve
the glaze, once is enough through an 80 mesh sieve. I use so many glazes
and never think twice about the fact that I am single firing when I choose a
glaze. I do take a barely damp sponge to the dry piece before glazing to
remove the dry clay film. With tiles I usually go up in temperature at
about 200 C per hour without any problems and don't worry about the paper
burning out. It has never produced reduction effects or any problems.
Linda
Ithaca, NY
\> I tried to read the book "Single firing" of Fran Tristram. In the
> beginning I enjoyed- latter was too complicated, I mean, if I must read
> a book with a dictionary, I give it up. It is a good book and I have got
> the idea.
> My question is to the PaperClayArters. May you give me hints about
> single firing with paperclay?
> Ababi, back to the list with the repaired computer.
Ron Roy on thu 30 oct 03
This looks like it could be problematic - especially at cone 6 - if the
boron seals over before the carbon is gone - and it will with higher
amounts of boron in glazes - then I would imagine all kinds of problems.
I noticed in an article by Stephen Hill - on single firing - that care must
be taken to get the combustables out before the glazes seal over - he fires
to cone 10 so there would not be much boron present if any.
Paper clay has a lot of carbon to burn out so slow firing will probably be
necessary.
RR
>Hi!
>I tried to read the book "Single firing" of Fran Tristram. In the
>beginning I enjoyed- latter was too complicated, I mean, if I must read
>a book with a dictionary, I give it up. It is a good book and I have got
>the idea.
>My question is to the PaperClayArters. May you give me hints about
>single firing with paperclay?
>Ababi, back to the list with the repaired computer.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Snail Scott on fri 31 oct 03
At 12:46 PM 10/30/03 -0500, you wrote:
>May you give me hints about
>>single firing with paperclay?
As with any one-shot firing, treat the lower-
temperature portion just like a bisque. Fire
as slowly as you normally would, until you
hit your normal bisque range, then fire as
fast as you would for a glaze firing. It's
basically just that simple.
If you have a clean-burning clay that is fully
burned out early in the bisque firing, and you
only fire higher for other reasons (like
absorption or hardness) then keep to your bisque
speed only until the body is clean, but if you
have a dirty clay body like paperclay, give it
all the time it needs before kicking up the
speed.
-Snail
Ababi on fri 31 oct 03
Thank you Ron
The bisque of the paperclay is slow.
In any case I will test it. About the B2O3 you are right, in any case I
plane it mostly for the matte or stony matte glazes.
Ababi
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Ron Roy
Sent: Thursday, October 30, 2003 7:47 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Single-paper-clay-glazing!?
This looks like it could be problematic - especially at cone 6 - if the
boron seals over before the carbon is gone - and it will with higher
amounts of boron in glazes - then I would imagine all kinds of problems.
I noticed in an article by Stephen Hill - on single firing - that care
must
be taken to get the combustables out before the glazes seal over - he
fires
to cone 10 so there would not be much boron present if any.
Paper clay has a lot of carbon to burn out so slow firing will probably
be
necessary.
RR
>Hi!
>I tried to read the book "Single firing" of Fran Tristram. In the
>beginning I enjoyed- latter was too complicated, I mean, if I must read
>a book with a dictionary, I give it up. It is a good book and I have
got
>the idea.
>My question is to the PaperClayArters. May you give me hints about
>single firing with paperclay?
>Ababi, back to the list with the repaired computer.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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LindaBlossom on sat 1 nov 03
> This looks like it could be problematic - especially at cone 6 - if the
> boron seals over before the carbon is gone - and it will with higher
> amounts of boron in glazes - then I would imagine all kinds of problems.
>
> I noticed in an article by Stephen Hill - on single firing - that care
must
> be taken to get the combustables out before the glazes seal over - he
fires
> to cone 10 so there would not be much boron present if any.
>
> Paper clay has a lot of carbon to burn out so slow firing will probably be
> necessary.
>
> >Hi!
> >I tried to read the book "Single firing" of Fran Tristram. In the
> >beginning I enjoyed- latter was too complicated, I mean, if I must read
> >a book with a dictionary, I give it up. It is a good book and I have got
> >the idea.
> >My question is to the PaperClayArters. May you give me hints about
> >single firing with paperclay?
> >Ababi, back to the list with the repaired computer.
>
I would love to be able to agree with Ron on all occasions but experience is
proving the above theory to be questionable. I make tiles very thin - less
than a quarter inch - probably about 3/16" and have been firing them in
electric at a rate of about 240 C/hr until the kiln slows down to about 160C
around the 900C point. Even at the higher temperatures as I approach cone
8, I maintain about 60C per hour. I have not had a problem with the glazes
as a result of anything burning out. I have been making the tiles thin to
eliminate moisture problems. The glazes are turning out really good as I
cool about 100C per hour until I reach 1000 and then shut down. The clay is
always paperclay and always single fired.
Linda
Ithaca, NY
Ababi on sun 2 nov 03
Sometimes I think Ron consider paperclay's density the same as natural
sea foam...
Ababi
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of
LindaBlossom
Sent: Sunday, November 02, 2003 1:22 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Single-paper-clay-glazing!?
> This looks like it could be problematic - especially at cone 6 - if
the
> boron seals over before the carbon is gone - and it will with higher
> amounts of boron in glazes - then I would imagine all kinds of
problems.
>
> I noticed in an article by Stephen Hill - on single firing - that care
must
> be taken to get the combustables out before the glazes seal over - he
fires
> to cone 10 so there would not be much boron present if any.
>
> Paper clay has a lot of carbon to burn out so slow firing will
probably be
> necessary.
>
> >Hi!
> >I tried to read the book "Single firing" of Fran Tristram. In the
> >beginning I enjoyed- latter was too complicated, I mean, if I must
read
> >a book with a dictionary, I give it up. It is a good book and I have
got
> >the idea.
> >My question is to the PaperClayArters. May you give me hints about
> >single firing with paperclay?
> >Ababi, back to the list with the repaired computer.
>
I would love to be able to agree with Ron on all occasions but
experience is
proving the above theory to be questionable. I make tiles very thin -
less
than a quarter inch - probably about 3/16" and have been firing them in
electric at a rate of about 240 C/hr until the kiln slows down to about
160C
around the 900C point. Even at the higher temperatures as I approach
cone
8, I maintain about 60C per hour. I have not had a problem with the
glazes
as a result of anything burning out. I have been making the tiles thin
to
eliminate moisture problems. The glazes are turning out really good as
I
cool about 100C per hour until I reach 1000 and then shut down. The
clay is
always paperclay and always single fired.
Linda
Ithaca, NY
.
Ron Roy on sun 2 nov 03
Hi Linda,
I said - high boron glazes at cone 6 - pots are glazed inside and out - if
the high boron glazes seals over before the carbon gets out - and if iron
is present - I expect over vitrification of the clay - as Stephen Hill also
warns about.
You glaze only one side and the clay is very thin - and you fire to what
cone 8? - any glazes with high boron? Any iron in the clay?
My answer to Ababi was to warn about possible problems - what don't you
agree with?
RR
>I would love to be able to agree with Ron on all occasions but experience is
>proving the above theory to be questionable. I make tiles very thin - less
>than a quarter inch - probably about 3/16" and have been firing them in
>electric at a rate of about 240 C/hr until the kiln slows down to about 160C
>around the 900C point. Even at the higher temperatures as I approach cone
>8, I maintain about 60C per hour. I have not had a problem with the glazes
>as a result of anything burning out. I have been making the tiles thin to
>eliminate moisture problems. The glazes are turning out really good as I
>cool about 100C per hour until I reach 1000 and then shut down. The clay is
>always paperclay and always single fired.
>
>Linda
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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