Mark Cortright on mon 7 may 12
I agree with Mel's post on ITC-really great stuff-I have used it a bunch
Here is another coating that I have use a lot as well.
This stuff sticks and stays stays put even in fireboxes.
I got this recipe from a glassblower who coated his glory hole of soft
brick and fiber and have coated both with it with good results.
Liquid COLLOIDAL SILICA mixed with milled ZIRCON
1 gallon is plenty of the liquid is plenty to buy.
start out by vacuuming kiln then spray all soft brick with water via a
mister bottle so its slightly damp. if its warm out only do the area
ahead of your application.
Start with a small say cereal bowl 1/2 full of colloidcal silica about
3/4 cup -This will be your learning curve batch-
add milled zircon powder to this until its like heavy cream (this
liquid absorbs a huge amount of powder)-use a wider brush and apply a
coat to damp area bricks- coat kiln -let dry then bisque fire.
This mix works as the best coating I have ever seen or used-Its a bit
hard to brush and will ruin your bowl and brush but will stick to just
about anything-It can be sprayed as well. Work it into all cracks as
its acts like a glue as well.
Use a respirator when spraying. It covers my soft bricks and rarely
spalls (comes off)
You will not find this pre made and must make your own from scratch.
Good luck-this stuff works. Its about 100% better than any other wash
you may want to apply to a kiln.
These ingredients are a bit harder to find but worth it.I still use
and like ITC but this stuff also has its place.
Mark Cortright
www.liscomhillpottery.com
jonathan byler on mon 7 may 12
Mark,
when you mention Zircon, do you mean ZrO2 or is a zirconium silicate
like zircopax workable also? also when you say "milled" are you
intending a specific mesh size?
thanks,
jon
p.s. I haven't had a chance to mess with it, but it seems colloidal
silica or colloidal alumina is probably a good base for a brick cement
to repair broken bricks. Probably less corrosive to the existing
brick than sodium sillicate. maybe a combination of both? with clay/
zircon fillers? from what I can tell, brick cements are specially
manufactured in industry for expansion to make sure that it moves with
the brick being repaired, so whatever fillers are used can be changed
to suit individual situations.
On May 7, 2012, at 12:37 PM, Mark Cortright wrote:
>
> Liquid COLLOIDAL SILICA mixed with milled ZIRCON
Robert Harris on mon 7 may 12
By the way colloidal silica ($22 6Oz) and Zircon flour ($20/lb) are
both readily available on e-bay. I'm sure I've seen colloidal silica
for cheaper than that on e-bay, so you may have to check back every so
often.
Robert
James Freeman on mon 7 may 12
Colloidal silica is $30 per gallon from Laguna (
http://www.axner.com/rigidizer.aspx)
...James
James Freeman
"Talk sense to a fool, and he calls you foolish."
-Euripides
http://www.jamesfreemanstudio.com
http://www.flickr.com/photos/jamesfreemanstudio/
http://www.jamesfreemanstudio.com/resources
On Mon, May 7, 2012 at 2:44 PM, Robert Harris wrot=
e:
> By the way colloidal silica ($22 6Oz) and Zircon flour ($20/lb) are
> both readily available on e-bay. I'm sure I've seen colloidal silica
> for cheaper than that on e-bay, so you may have to check back every so
> often.
>
> Robert
>
jonathan byler on mon 7 may 12
If one is willing to buy in bulk, these are both readily available
from foundry suppliers. Remet is one, budget casting supply probably
has them too.
On May 7, 2012, at 1:44 PM, Robert Harris wrote:
> By the way colloidal silica ($22 6Oz) and Zircon flour ($20/lb) are
> both readily available on e-bay. I'm sure I've seen colloidal silica
> for cheaper than that on e-bay, so you may have to check back every so
> often.
>
> Robert
jonathan byler on mon 7 may 12
that is just zircopax, ziconium silicate. thanks for letting me know.
On May 7, 2012, at 2:31 PM, Mark Cortright wrote:
> I looked it up at Laguna's web site for raw materials
> Its called
> ZIRCON, G MILLED*
> ZrSi04
>
> Mark
> On May 7, 2012, at 11:32 AM, jonathan byler wrote:
>
>> Mark,
>>
>> when you mention Zircon, do you mean ZrO2 or is a zirconium
>> silicate like zircopax workable also? also when you say "milled"
>> are you intending a specific mesh size?
>>
>> thanks,
>> jon
>>
>
Eleanora Eden on mon 4 jun 12
Hi Mark,
This is such a welcome idea. I bought a gallon of colloidal silica
a few years ago and have used a tiny bit of it combined with I think
kaolin and flint for a surface treatment and as a glue. I will be trying
your recipe very soon. I googled zircon powder and it seems it is
zircopax. Correct?
I have lots of things to use this on but my most immediate quest is
for a better kiln wash for glass. Especially my little kao-board microwave
glass cooker. I coated the outside with itc 200 (I think) immediately as t=
he
outsides seemed to degrade when you look at it, and that has worked very
well indeed. Now I want a better coating for the firing surface. I
hate firing
on the kaowool paper and have been using regular kiln wash but that doesn't
stick worth squat. I bet this will work very well.
Am just putting in a ^04 kiln firing and am thinking of making up a tiny bi=
t,
applying it to a scrap of kao-board, and seeing how it goes.
Any comments?
Thanks,
Eleanora
--
Bellows Falls Vermont
www.eleanoraeden.com
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