Laurie on thu 8 mar 12
I had to add that I actually found the old jar of rigidizer out in the gara=
ge a
little while ago. Must be at least 10 years old and had hardened into a cru=
nchy
clear mass that I chopped up. I have added water to it and it seems to be
dissolving. Maybe it will be ready to be used tomorrow.
Anyway, I am still curious about the difference between the two things.
Thanks!
Laurie in Sacramento
________________________________
From: Laurie
To: Clayart@LSV.CERAMICS.ORG
Sent: Thu, March 8, 2012 6:17:38 PM
Subject: Rigidizer for Superwool
Hi Clayarters,
I am rebuilding my raku kiln and have just installed new Superwool blanket =
and I
wanted to seal some of the cut edges with rigidizer. I bought something yea=
rs
ago that was actually called "rigidizer". From what I can discover online t=
he
stuff sold as rigidizer is colloidal silica. I have some liquid sodium sili=
cate.
Are they the same thing? Or, if not, can the sodium silicate be used as a s=
ealer
on the fiber blanket? I'm not in a hurry and if the answer is no, I plan to=
go
get some "rigidizer" tomorrow. But it got me thinking and I decided to ask =
the
question.
Thanks!
Laurie in Sacramento (heading to my second NCECA in Seattle, can't wait!)
Ben Morrison on thu 8 mar 12
From what I understand from second hand experience in a good friends raku k=
iln sodium silicate will soak into the superwool. This increases the therma=
l mass of the blanket pulling heat out of your kiln instead of acting like =
insulation. I'm not sure if you can do it in a neater fashion that he did, =
but his looked like a pile of garbage after he was done. From my limited ex=
perience with this issue I would advise against the sodium silicate method.
________________________________
From: Laurie
To: Clayart@LSV.CERAMICS.ORG
Sent: Thursday, March 8, 2012 6:17 PM
Subject: Rigidizer for Superwool
Hi Clayarters,
I am rebuilding my raku kiln and have just installed new Superwool blanket =
and I
wanted to seal some of the cut edges with rigidizer. I bought something yea=
rs
ago that was actually called "rigidizer". From what I can discover online t=
he
stuff sold as rigidizer is colloidal silica. I have some liquid sodium sili=
cate.
Are they the same thing? Or, if not, can the sodium silicate be used as a s=
ealer
on the fiber blanket? I'm not in a hurry and if the answer is no, I plan to=
go
get some "rigidizer" tomorrow. But it got me thinking and I decided to ask =
the
question.
Thanks!
Laurie in Sacramento (heading to my second NCECA in Seattle, can't wait!)
Laurie on thu 8 mar 12
Hi Clayarters,
I am rebuilding my raku kiln and have just installed new Superwool blanket =
and I
wanted to seal some of the cut edges with rigidizer. I bought something yea=
rs
ago that was actually called "rigidizer". From what I can discover online t=
he
stuff sold as rigidizer is colloidal silica. I have some liquid sodium sili=
cate.
Are they the same thing? Or, if not, can the sodium silicate be used as a s=
ealer
on the fiber blanket? I'm not in a hurry and if the answer is no, I plan to=
go
get some "rigidizer" tomorrow. But it got me thinking and I decided to ask =
the
question.
Thanks!
Laurie in Sacramento (heading to my second NCECA in Seattle, can't wait!)
jonathan byler on fri 9 mar 12
no, they are not the same thing. quick google search for each of
these two items should tell you everything you wanted to know but were
afraid to ask...
On Mar 9, 2012, at 1:41 AM, Ben Morrison wrote:
> From what I understand from second hand experience in a good friends
> raku kiln sodium silicate will soak into the superwool. This
> increases the thermal mass of the blanket pulling heat out of your
> kiln instead of acting like insulation. I'm not sure if you can do
> it in a neater fashion that he did, but his looked like a pile of
> garbage after he was done. From my limited experience with this
> issue I would advise against the sodium silicate method.
>
>
> ________________________________
> From: Laurie
> To: Clayart@LSV.CERAMICS.ORG
> Sent: Thursday, March 8, 2012 6:17 PM
> Subject: Rigidizer for Superwool
>
> Hi Clayarters,
> I am rebuilding my raku kiln and have just installed new Superwool
> blanket and I
> wanted to seal some of the cut edges with rigidizer. I bought
> something years
> ago that was actually called "rigidizer". From what I can discover
> online the
> stuff sold as rigidizer is colloidal silica. I have some liquid
> sodium silicate.
> Are they the same thing? Or, if not, can the sodium silicate be used
> as a sealer
> on the fiber blanket? I'm not in a hurry and if the answer is no, I
> plan to go
> get some "rigidizer" tomorrow. But it got me thinking and I decided
> to ask the
> question.
> Thanks!
> Laurie in Sacramento (heading to my second NCECA in Seattle, can't
> wait!)
Steve Mills on fri 9 mar 12
Ben and Jonathan are absolutely right, although apparently similar the two =
a=3D
re totally different.=3D20
Rigidizer proper has a wetting agent in it, and when sprayed onto blanket (=
p=3D
referably using a greenhouse hand sprayer and wearing a respirator) it comb=
i=3D
nes with the surface of the blanket adding virtually no weight to it while =
r=3D
educing "dusting" to a minimum.=3D20
Any blanket protection substance that adds weight to where it's applied is =
g=3D
oing to cause the surface to separate from the body of the blanket with (po=
t=3D
entially) disastrous results.=3D20
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod
>=3D20
Laurie on fri 9 mar 12
That's why I am thinking of just applying it to the cut edges of the blanke=
t.
Mainly looking at some sort of binder to keep them from fraying and spreadi=
ng
little fiber bits all over the environment and any glazed ware inside the k=
iln.
So the edges would be the bottom of the shell and around the flue and peeph=
oles.
If there's a better way to achieve the same thing, I am open to all suggest=
ions.
This is my third raku shell over the past 20-some years and I keep trying t=
o
make each one better than the last. Of course in my neck of the woods, the
biggest enemy to these fiber blankets is rats. They love to build nests out=
of
it and chew holes in it. The trick is covering it up when not in use so the=
y
can't get to it.
Thanks,
Laurie in Sacramento
________________________________
From: Ben Morrison
To: Clayart@LSV.CERAMICS.ORG
Sent: Thu, March 8, 2012 11:41:55 PM
Subject: Re: Rigidizer for Superwool
From what I understand from second hand experience in a good friends raku k=
iln
sodium silicate will soak into the superwool. This increases the thermal ma=
ss of
the blanket pulling heat out of your kiln instead of acting like insulation=
. I'm
not sure if you can do it in a neater fashion that he did, but his looked l=
ike a
pile of garbage after he was done. From my limited experience with this iss=
ue I
would advise against the sodium silicate method.
________________________________
From: Laurie
To: Clayart@LSV.CERAMICS.ORG
Sent: Thursday, March 8, 2012 6:17 PM
Subject: Rigidizer for Superwool
Hi Clayarters,
I am rebuilding my raku kiln and have just installed new Superwool blanket =
and I
wanted to seal some of the cut edges with rigidizer. I bought something yea=
rs
ago that was actually called "rigidizer". From what I can discover online t=
he
stuff sold as rigidizer is colloidal silica. I have some liquid sodium sili=
cate.
Are they the same thing? Or, if not, can the sodium silicate be used as a s=
ealer
on the fiber blanket? I'm not in a hurry and if the answer is no, I plan to=
go
get some "rigidizer" tomorrow. But it got me thinking and I decided to ask =
the
question.
Thanks!
Laurie in Sacramento (heading to my second NCECA in Seattle, can't wait!)
Laurie on fri 9 mar 12
Thanks, Steve.
Actually I did google both of them and that got me more confused as to thei=
r
usage with ceramic fiber blanket. I had read about a commercial raku kiln w=
here
the description said they used sodium silicate on the blanket and I knew ab=
out
the rigidizer being the colloidal silica and being something different.
I have about 45 ceramic buttons holding the blanket in place so I am hoping=
they
will maybe help keep the blanket together as well. I hadn't thought about t=
he
face getting heavier with the coating and actually coming off. That sounds =
like
a good reason to not spray the entire interior surface with it!
Laurie in Sacramento
________________________________
From: Steve Mills
To: Clayart@LSV.CERAMICS.ORG
Sent: Fri, March 9, 2012 6:25:32 AM
Subject: Re: Rigidizer for Superwool
Ben and Jonathan are absolutely right, although apparently similar the two =
are
totally different.
Rigidizer proper has a wetting agent in it, and when sprayed onto blanket
(preferably using a greenhouse hand sprayer and wearing a respirator) it
combines with the surface of the blanket adding virtually no weight to it w=
hile
reducing "dusting" to a minimum.
Any blanket protection substance that adds weight to where it's applied is =
going
to cause the surface to separate from the body of the blanket with (potenti=
ally)
disastrous results.
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod
>
Steve Mills on sat 10 mar 12
Spraying with Rigidizer is OK because it adds very little if any weight to =
t=3D
he blanket surface.=3D20
I do seriously recommend you spray the interior of your kiln; gas flame doe=
s=3D
degrade the blanket and push the resulting dust into the air where you are=
o=3D
perating.=3D20
One tip I offer is if it is colourless, is to add some food dye to it so th=
a=3D
t you can see how good a coating you have applied.=3D20
My kilns lasted for several years with an occasional re-spray when the blan=
k=3D
et started to look a bit worn, and they had a lot of use.=3D20
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod
On 9 Mar 2012, at 18:42, Laurie wrote:
> Thanks, Steve.=3D20
> Actually I did google both of them and that got me more confused as to th=
e=3D
ir usage with ceramic fiber blanket. I had read about a commercial raku kil=
n=3D
where the description said they used sodium silicate on the blanket and I =
k=3D
new about the rigidizer being the colloidal silica and being something diff=
e=3D
rent.
>=3D20
> I have about 45 ceramic buttons holding the blanket in place so I am hopi=
n=3D
g they will maybe help keep the blanket together as well. I hadn't thought =
a=3D
bout the face getting heavier with the coating and actually coming off. Tha=
t=3D
sounds like a good reason to not spray the entire interior surface with it=
!=3D
>=3D20
> Laurie in Sacramento
>=3D20
> From: Steve Mills
> To: Clayart@LSV.CERAMICS.ORG
> Sent: Fri, March 9, 2012 6:25:32 AM
> Subject: Re: Rigidizer for Superwool
>=3D20
> Ben and Jonathan are absolutely right, although apparently similar the tw=
o=3D
are totally different.=3D20
> Rigidizer proper has a wetting agent in it, and when sprayed onto blanket=
(=3D
preferably using a greenhouse hand sprayer and wearing a respirator) it com=
b=3D
ines with the surface of the blanket adding virtually no weight to it while=
r=3D
educing "dusting" to a minimum.=3D20
>=3D20
> Any blanket protection substance that adds weight to where it's applied i=
s=3D
going to cause the surface to separate from the body of the blanket with (=
p=3D
otentially) disastrous results.=3D20
>=3D20
> Steve M
>=3D20
>=3D20
> Steve Mills
> Bath
> UK
> www.mudslinger.me.uk
> Sent from my iPod
>=3D20
> >=3D20
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