William & Susan Schran User on wed 21 may 08
> This message is in MIME format. Since your mail reader does not understand
this format, some or all of this message may not be legible.
--B_3294228291_646288
Content-type: text/plain;
charset="ISO-8859-1"
Content-transfer-encoding: quoted-printable
On 5/21/08 8:18 AM, "nori" wrote:
> i fire at cone 6, ox.
> and i have a favorite glaze, but 1 out of 10 firings, i get pinholes... n=
asty
> ones with rough edges... like burst blisters that didn't have time to hea=
l.
> short of turning these pieces into shards, is there any way to fix the
> craters?
> would rebisquing help?
> or re firing to cone 6, with or without touching up the areas with a titc=
h
> more glaze?
> i appreciate any ideas.
>=20
> Without the, clay body, glaze recipe, glaze application method, your firi=
ng
> schedule, if you use cones and are really firing to ^6 each firing and wh=
at is
> different about that 1 out of 10 firings, I doubt folks who are willing t=
o
> help you solve the problem can help =AD we simply need more information as =
there
> are too many variables involved.
>=20
> Please post back with more information.
>=20
> Bill
>=20
--=20
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
--B_3294228291_646288
Content-type: text/html;
charset="ISO-8859-1"
Content-transfer-encoding: quoted-printable
Re: pinholes in glaze
On 5/=
21/08 8:18 AM, "nori" <clayclif@EARTHLINK.NET> wrote:
FF">i fire at cone 6, ox.
and i have a favorite glaze, but 1 out of 10 firings, i get pinholes... nas=
ty ones with rough edges... like burst blisters that didn't have time to hea=
l.
short of turning these pieces into shards, is there any way to fix the crat=
ers?
would rebisquing help?
or re firing to cone 6, with or without touching up the areas with a titch =
more glaze?
i appreciate any ideas.
Without the, clay body, glaze recipe, glaz=
e application method, your firing schedule, if you use cones and are really =
firing to ^6 each firing and what is different about that 1 out of 10 firing=
s, I doubt folks who are willing to help you solve the problem can help R=
11; we simply need more information as there are too many variables involved=
.
Please post back with more information.
Bill
na, Helvetica, Arial">--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekarti=
sans.com
--B_3294228291_646288--
Steve Mills on wed 21 may 08
I suspect over-firing. Are you using cones?
Steve
--- On Wed, 5/21/08, nori <clayclif@EARTHLINK.NET> wrote:
From: nori <clayclif@EARTHLINK.NET>
Subject: pinholes in glaze
To: CLAYART@LSV.CERAMICS.ORG
Date: Wednesday, May 21, 2008, 12:18 PM
hi, everyone.
i fire at cone 6, ox.
and i have a favorite glaze, but 1 out of 10 firings, i get pinholes...
nasty ones with rough edges... like burst blisters that didn't have
time to heal.
short of turning these pieces into shards, is there any way to fix the
craters?
would rebisquing help?
or re firing to cone 6, with or without touching up the areas with a
titch more glaze?
i appreciate any ideas.
thanks!
|
nori on wed 21 may 08
This is a multi-part message in MIME format.
--------------050606070109050208000900
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit
hi, everyone.
i fire at cone 6, ox.
and i have a favorite glaze, but 1 out of 10 firings, i get pinholes...
nasty ones with rough edges... like burst blisters that didn't have time
to heal.
short of turning these pieces into shards, is there any way to fix the
craters?
would rebisquing help?
or re firing to cone 6, with or without touching up the areas with a
titch more glaze?
i appreciate any ideas.
thanks!
--
Clifton, Norwich & Sabra
My pottery cat clay
Our studio crocus clay works
My charity A little effort + no money = a big difference!
sample soap
--------------050606070109050208000900
Content-Type: text/html; charset=us-ascii
Content-Transfer-Encoding: 7bit
hi, everyone.
i fire at cone 6, ox.
and i have a favorite glaze, but 1 out of 10 firings, i get pinholes...
nasty ones with rough edges... like burst blisters that didn't have
time to heal.
short of turning these pieces into shards, is there any way to fix the
craters?
would rebisquing help?
or re firing to cone 6, with or without touching up the areas with a
titch more glaze?
i appreciate any ideas.
thanks!
--------------050606070109050208000900--
Steve Slatin on wed 21 may 08
Nori --
I don't have any organized testing on
this, but these are my observations --
Bisque temp probably won't be enough to do
anything. If you've got a whole kiln-load,
you might try to fire to a half-cone or cone
below your regular temp, with a hold long
enough to allow the pinholes to 'heal' --
I find 20 minutes is usually enough.
If the pinholes are large enough to require
adding glaze, you'll probably need to go to
full temp in the refiring. You may have
serious losses with this, the hire the temp
on a refire, the more damage there is.
Of course you should be smart about picking
the pieces for refire -- if the glaze is
'sagging' or getting close to running at the
foot, don't refire it -- you'll just have
bigger problems to deal with.
Steve Slatin --
--- On Wed, 5/21/08, nori wrote:
> From: nori
> Subject: pinholes in glaze
> To: CLAYART@LSV.CERAMICS.ORG
> Date: Wednesday, May 21, 2008, 5:18 AM
> hi, everyone.
>
> i fire at cone 6, ox.
>
> and i have a favorite glaze, but 1 out of 10 firings, i get
> pinholes...
> nasty ones with rough edges... like burst blisters that
> didn't have time
> to heal.
>
> short of turning these pieces into shards, is there any way
> to fix the
> craters?
>
> would rebisquing help?
>
> or re firing to cone 6, with or without touching up the
> areas with a
> titch more glaze?
>
> i appreciate any ideas.
>
> thanks!
Ron Roy on fri 23 may 08
Hi Nori,
We can find out by the method of elimination - first step id email me the
glaze recipe and we will see if the problem is there.
RR
>hi, everyone.
>
>i fire at cone 6, ox.
>
>and i have a favorite glaze, but 1 out of 10 firings, i get pinholes...
>nasty ones with rough edges... like burst blisters that didn't have time
>to heal.
>
>short of turning these pieces into shards, is there any way to fix the
>craters?
>
>would rebisquing help?
>
>or re firing to cone 6, with or without touching up the areas with a
>titch more glaze?
>
>i appreciate any ideas.
>
>thanks!
Ron Roy
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
| |
|
