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still trying to fire sculpture

updated mon 20 feb 12

 

John McClure on sat 18 feb 12


___________________________=3D

I agree with Steve's comments=3D0AJohn=3D0A=3D0A=3D0A=3D0A_________________=
__________=3D
_____=3D0A From: Steve Mills =3D0ATo: Clayar=
t@LS=3D
V.CERAMICS.ORG =3D0ASent: Saturday, February 18, 2012 6:12 PM=3D0ASubject: =
Re: =3D
still trying to fire sculpture=3D0A =3D0A1) yes=3D0A2) maybe; you will agai=
n be "=3D
advised" by the moisture on your mirror. =3D0A3) you are doing nothing wron=
g,=3D
the regime you are following is right for the=3DA0 results you want to ach=
ie=3D
ve. =3D0A4) that is next to impossible until you see dull red heat, in whic=
h =3D
case you are plus 600oC. =3D0A=3D0ASteve M=3D0A=3D0A=3D0ASteve Mills=3D0ABa=
th=3D0AUK=3D0Aww=3D
w.mudslinger.me.uk=3D0ASent from my iPod=3D0A=3D0A=3D0AOn 18 Feb 2012, at 1=
7:58, Ka=3D
te Mondrone wrote:=3D0A=3D0A> so, these pcs were well d=
ried=3D
--after working on them 1 at a time & over=3DA0 a=3D0A> period of 3 weeks a=
nd t=3D
he last one dried for a week before firing, but=3DA0 they=3D0A> were expose=
d to=3D
outside air since my workshop isnt=3DA0 insulated.=3D0A> =3D0A> i have an =
old ga=3D
re kiln, which they no longer make,=3DA0 with a=3DA0 collar and=3D0A> kiln =
sitter=3D
.=3DA0 the collar adds a fifth on/off style switch=3DA0 in total. the kiln=
=3D0A>=3D
is stacked with only 3 shelves.=3DA0 the bottom=3DA0 shelf had thin/short =
item=3D
s,=3D0A> second shelf had mugs and the like on it, and the=3DA0 top shelf h=
ad m=3D
y 3=3D0A> sculptures on it--from 1/4 inch to 1 inch +/- thick. i dont=3DA0 =
have=3D
a thermometer, so=3D0A> i have idea of the interior kiln temp.=3DA0 at 7am=
&=3D
=3DA0 beginning with the bottom=3D0A> switch, i turned it on with the lid c=
rack=3D
ed and both=3DA0 peeps open.=3DA0 since=3D0A> there was no vapor on my mirr=
or aff=3D
ter 2 hours, i=3DA0 shut the lid.=3DA0 vapors then=3D0A> began to occur & t=
hen di=3D
scontinued=3DA0 after 2 hours so i turned on the next=3D0A> switch.=3DA0 at=
5 pm =3D
the second=3DA0 switch was still on and vapor was still coming out=3D0A> of=
the=3D
top peep on my=3DA0 mirror.=3DA0 at 5pm i shut the kiln off.=3DA0 this mor=
ning i=3D
=3D0A> looked in it and=3DA0 it seems that everything survived and the cone=
is =3D
still=3D0A> intact.=3D0A> =3D0A> so...=3D0A> =3D0A> 1)can i reuse the cone =
cause id h=3D
ave to unload to replace it?=3D0A> 2)shouldn't the next firing take less ti=
me=3D
cause the pcs are already very=3D0A> dry?=3D0A> 3) what am i doing wrong, =
if a=3D
nything and should i do anything differently=3D0A> next time?=3D0A> 4)can a=
nyon=3D
e guess as to the temperature associated with each switch?=3DA0 i=3D0A> do=
nt h=3D
ave a manual either.=3D0A> =3D0A> thanks for your help again, kate

Kate Mondrone on sat 18 feb 12


so, these pcs were well dried--after working on them 1 at a time & over a
period of 3 weeks and the last one dried for a week before firing, but the=
y
were exposed to outside air since my workshop isnt insulated.

i have an old gare kiln, which they no longer make, with a collar and
kiln sitter . the collar adds a fifth on/off style switch in total. the k=
iln
is stacked with only 3 shelves. the bottom shelf had thin/short items,
second shelf had mugs and the like on it, and the top shelf had my 3
sculptures on it--from 1/4 inch to 1 inch +/- thick. i dont have a thermom=
eter, so
i have idea of the interior kiln temp. at 7am & beginning with the bottom
switch, i turned it on with the lid cracked and both peeps open. since
there was no vapor on my mirror affter 2 hours, i shut the lid. vapors th=
en
began to occur & then discontinued after 2 hours so i turned on the next
switch. at 5 pm the second switch was still on and vapor was still coming=
out
of the top peep on my mirror. at 5pm i shut the kiln off. this morning i
looked in it and it seems that everything survived and the cone is still
intact.

so...

1)can i reuse the cone cause id have to unload to replace it?
2)shouldn't the next firing take less time cause the pcs are already very
dry?
3) what am i doing wrong, if anything and should i do anything differently
next time?
4)can anyone guess as to the temperature associated with each switch? i
dont have a manual either.

thanks for your help again, kate

Steve Mills on sat 18 feb 12


1) yes
2) maybe; you will again be "advised" by the moisture on your mirror.=3D20
3) you are doing nothing wrong, the regime you are following is right for t=
h=3D
e results you want to achieve.=3D20
4) that is next to impossible until you see dull red heat, in which case yo=
u=3D
are plus 600oC.=3D20

Steve M


Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod


On 18 Feb 2012, at 17:58, Kate Mondrone wrote:

> so, these pcs were well dried--after working on them 1 at a time & over =
a=3D

> period of 3 weeks and the last one dried for a week before firing, but t=
h=3D
ey
> were exposed to outside air since my workshop isnt insulated.
>=3D20
> i have an old gare kiln, which they no longer make, with a collar and
> kiln sitter . the collar adds a fifth on/off style switch in total. the=
k=3D
iln
> is stacked with only 3 shelves. the bottom shelf had thin/short items,
> second shelf had mugs and the like on it, and the top shelf had my 3
> sculptures on it--from 1/4 inch to 1 inch +/- thick. i dont have a therm=
o=3D
meter, so
> i have idea of the interior kiln temp. at 7am & beginning with the bott=
o=3D
m
> switch, i turned it on with the lid cracked and both peeps open. since
> there was no vapor on my mirror affter 2 hours, i shut the lid. vapors =
t=3D
hen
> began to occur & then discontinued after 2 hours so i turned on the next
> switch. at 5 pm the second switch was still on and vapor was still comi=
n=3D
g out
> of the top peep on my mirror. at 5pm i shut the kiln off. this morning=
i=3D

> looked in it and it seems that everything survived and the cone is still
> intact.
>=3D20
> so...
>=3D20
> 1)can i reuse the cone cause id have to unload to replace it?
> 2)shouldn't the next firing take less time cause the pcs are already very
> dry?
> 3) what am i doing wrong, if anything and should i do anything differentl=
y=3D

> next time?
> 4)can anyone guess as to the temperature associated with each switch? i
> dont have a manual either.
>=3D20
> thanks for your help again, kate