Diane Walls on tue 25 oct 11
I have a relatively new kiln and the inside lid surface began cracking
and peeling off after only (6) ^06 firings. A replacement lid is being
sent, but I was told it was caused by damp/humid conditions.
Thanks to Clayart archives, the below is what I find to make sense.
Any others have a similar experience?
Diane Walls
Arnold Howard on tue 16 oct 07
From: "Carole Fox"
>I noticed a while ago that the underside of my kiln lid
>has a few large
> blisters on it.
------------
Carole, the inside lid surface is coated to reduce dust. If
the refractory coating is too thick, it will blister just as
you describe.
It is easy to repair, though. Lightly remove the blistering
with grit cloth or sandpaper, and apply a new coat over that
area. Or you could even leave it uncoated.
I will post a new video on coating the lid at this link by
tomorrow or the next day:
http://www.paragonweb.com/videos.cfm
You can also download "Firebrick Repair Instructions" from
this link:
http://www.paragonweb.com/Instruction_Manuals.cfm
Sometimes a new employee with apply lid coating too thick,
because they want it to look even, as if they were trying to
paint something without streaks. But the ideal coating
should be thin enough so that you can still see the
firebricks underneath.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
Carole Fox on wed 26 oct 11
Diane - I posted the question that you quoted, some time ago! My kiln li=
=3D
d has=3D20
continued to blister, but I just sand or peel off the flaky areas when th=
=3D
ey=3D20
appear. I have not put a new coating on it, because I think I would have=
=3D
to=3D20
remove all the original coating to do so. The flaking lid has not caused=
=3D
any=3D20
problem with my work.=3D20=3D20
Carole Fox=3D20
Dayton, OH
Arnold Howard on wed 26 oct 11
On 10/26/2011 6:27 AM, Carole Fox wrote:
> Diane - I posted the question that you quoted, some time ago! My kiln li=
d has
> continued to blister, but I just sand or peel off the flaky areas when th=
ey
> appear.
Carole, I like your minimalist approach to lid repair. Often the easiest
solution is the best one.
Use only a small amount of lid coating. The natural tendency is to apply
too much, because it looks better than a thin layer. You should still be
able to see the firebrick pores under the coating. A thick coating
cracks like crazed glaze.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
Diane Walls on thu 27 oct 11
Carole,
This large kiln is new and there have been other problems with it.
Large cracks in the floor, which I'm repairing, and cracks in the
walls which I'm accepting. I was told that with larger kilns the floor
and walls are prone to cracking. It's made for ^10. I've done (8) ^06
firings and (8) ^6. Cracks started after (6) ^06 firings.
And we changed out the controller board and thermocouple because it
wasn't firing to temp. The coating inside the lid is cracked
extensively and I fire with a layer of shelves at the top to protect
my work. So, I'm looking forward to a new lid, at least.
Diane
On Oct 26, 2011, at 6:27 AM, Carole Fox wrote:
> Diane - I posted the question that you quoted, some time ago! My
> kiln lid has
> continued to blister, but I just sand or peel off the flaky areas
> when they
> appear. I have not put a new coating on it, because I think I would
> have to
> remove all the original coating to do so. The flaking lid has not
> caused any
> problem with my work.
>
> Carole Fox
> Dayton, OH
| |
|
