terri roy on sun 6 feb 11
I don't usually try to fix a bowl with an S crack but today I decided to pl=
=3D
ay.=3D0A=3D0ANote - I have no clue what I'm doing, the clay is supplied, th=
e gl=3D
aze premixed =3D0Aand the firing done for me.=3DA0 I've been busy learning =
to t=3D
hrow and trim, so I =3D0Aguess this is my first foray into the rest of the =
po=3D
ttery world=3D0A=3D0AI mixed some 400 mesh flint with magic water and dripp=
ed t=3D
hat into the crack on =3D0Aboth the inside and outside the bowl.=3D0A=3D0AD=
oes an=3D
yone have any clue if this is going to work or will I owe the kiln owner =
=3D
=3D0Aand new kiln?=3D0A=3D0AThanks!
Steve Mills on mon 7 feb 11
Well you're thinking in the right direction. Mixing a non-plastic material =
w=3D
ith a semi-liquid is a sensible line of exploration.=3D20
What you've done won't blow up the kiln, and I can't tell you if it will wo=
r=3D
k, but set the piece on a clay and sand disc for firing, just in case the m=
i=3D
xture decides to run onto the shelf.=3D20
But be careful; you are starting on the rocky road of ceramic DIY!
:-)
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my Ipod touch
On 7 Feb 2011, at 00:57, terri roy wrote:
> I don't usually try to fix a bowl with an S crack but today I decided to =
p=3D
lay.
>=3D20
> Note - I have no clue what I'm doing, the clay is supplied, the glaze pre=
m=3D
ixed=3D20
> and the firing done for me. I've been busy learning to throw and trim, s=
o=3D
I=3D20
> guess this is my first foray into the rest of the pottery world
>=3D20
> I mixed some 400 mesh flint with magic water and dripped that into the cr=
a=3D
ck on=3D20
> both the inside and outside the bowl.
>=3D20
> Does anyone have any clue if this is going to work or will I owe the kiln=
o=3D
wner=3D20
> and new kiln?
>=3D20
> Thanks!
Ron Roy on mon 7 feb 11
Hi Terry,
What cone will you have it fired to?
The filler material will have a different expansion than the clay =3D20
though - not sure how that will work out - but it will not melt.
RR
Quoting terri roy :
> I don't usually try to fix a bowl with an S crack but today I =3D20
> decided to play.
>
> Note - I have no clue what I'm doing, the clay is supplied, the =3D20
> glaze premixed
> and the firing done for me.=3DA0 I've been busy learning to throw and tri=
m, =3D
so I
> guess this is my first foray into the rest of the pottery world
>
> I mixed some 400 mesh flint with magic water and dripped that into =3D20
> the crack on
> both the inside and outside the bowl.
>
> Does anyone have any clue if this is going to work or will I owe the =3D2=
0
> kiln owner
> and new kiln?
>
> Thanks!
>
Fred Parker on mon 7 feb 11
My experience with cracks is this: Start over. Remember, everything
shrinks at each step of the process from wet clay through glaze firing. =
=3D
For
me it's not worth the time, effort and eventual disappointment of trying =
=3D
to
repair cracks when I could be throwing pots.
Instead of trying to repair cracks, use the time and energy to figure out=
=3D
why it cracked in the first place. Usually its drying too fast or failur=
=3D
e
to compress the bottom...
Fred Parker
On Sun, 6 Feb 2011 16:57:32 -0800, terri roy wrote:=
=3D
>I don't usually try to fix a bowl with an S crack but today I decided to=
=3D
play.
Note - I have no clue what I'm doing, the clay is supplied, the glaze pre=
=3D
mixed=3D20
and the firing done for me.=3DA0 I've been busy learning to throw and trim,=
=3D
so I=3D20
guess this is my first foray into the rest of the pottery world
I mixed some 400 mesh flint with magic water and dripped that into the cr=
=3D
ack on=3D20
both the inside and outside the bowl.
Does anyone have any clue if this is going to work or will I owe the kiln=
=3D
owner=3D20
and new kiln?
Thanks!
John Britt on tue 8 feb 11
Terr,
Take some bisque of the same clay and grind it up in a mortal and pestal.=
=3D
Then=3D20
add some sodium silicate and smash it into the cracks. Bisque again.
Alternatively, you can just take some of the same clay (wet) and dry it a=
=3D
nd=3D20
smash it up into a powder and then bisque that. (you have essentially mad=
=3D
e grog=3D20
from your own body) Then add the sodium silicate to that and smash into c=
=3D
rack=3D20
as above.
This is a crack fix. Unfortunately true "S" cracks don't always fix well =
=3D
because=3D20
when you fire to maturity they grow along the S. But it is always worth a=
=3D
try?!
Hope it helps.=3D20
John Britt=3D20
www.johnbritpottery.com
| |
|
