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Awful Shelves Question...please Help


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#1 Stonethrownpottery

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Posted 13 September 2013 - 07:56 PM

So I bought a kiln that came with shelves and posts...unfortunately the person before me NEVER put kiln wash on the shelves and there "was" glaze ALL over them. I am talking a ring or 2 or 3 on each shelf.  I have chiseled all the glaze off and as I am preparing to kiln wash them I have a question...

 

Should I kiln wash the flat surface of the shelves and leave the chipped as the under side?

 

OR

 

Should I kiln wash the cratered side of the shelf and use that as the top? 

 

This is my first kiln...sorry for the many questions that will come from now on! Thanks so much!



#2 bciskepottery

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Posted 13 September 2013 - 08:28 PM

If you have gotten all the glaze rings and glaze drops removed, and if there was no kiln wash on the shelves . . . then you could flip them and use the good side.  But, if any glaze remains on the chipped sides and you flip them, the glaze remnants could melt and fall onto wares.  If you don't want to risk that, you can fill the crates with kiln wash, let the craters dry, and then apply kiln wash to the entire side. 

 

Might be worth investing in a hand grinder to make sure the glaze rings and such are really removed and the surface is smoother. 



#3 Diane Puckett

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Posted 13 September 2013 - 09:26 PM

I had a glaze run onto a shelf, and grinding it out left a gouge. I bought a small container of Greenpatch 421 and used it to fill the gouge before coating it with kiln wash. So far it has held up well, and at least the shelf is level.
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#4 Benzine

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Posted 13 September 2013 - 10:39 PM

I had a glaze run onto a shelf, and grinding it out left a gouge. I bought a small container of Greenpatch 421 and used it to fill the gouge before coating it with kiln wash. So far it has held up well, and at least the shelf is level.


Hmmm....Would kiln cement work too I wonder?
"Anything worth believing, is worth questioning"

#5 Pres

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Posted 13 September 2013 - 10:59 PM

Did that one time Ben, the cement must shrink at a different rate, and it became loose on first firing.

 

In this case, I am with others here, if it is cleaned off well, turn it over and use other side.  The only down side I have had with this is the uneveness sometimes makes it difficult to seat the shelf on the stilts. If that is not an issue, I have done this and had the small amount of glaze that might be left on the underside flatten out, and become overfired(bubbly) due to the higher heat on the underside of the shelf. Next kiln loading I would clean more of this type of area. Couple of firings no problem from there on.


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#6 TJR

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Posted 14 September 2013 - 10:49 AM

I say buy new shelves. Not that expensive and worth your time.

TJR.



#7 Benzine

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Posted 15 September 2013 - 08:40 AM

I say buy new shelves. Not that expensive and worth your time.

TJR.

Whoa, settle down TJR, not everyone makes that big "Teacher Money", and can afford to spend, spend, spend......


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#8 Mark C.

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Posted 15 September 2013 - 03:42 PM

I suggest grinding out all the glaze(use a 4 inch hand held grinder) then fill with kiln wash then coat entire shelve when the 1st hole fill dries.

Second I would think as mentioned to get some new shelves and replace these as they will always be somewhat uneven.

Mark


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#9 flowerdry

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Posted 15 September 2013 - 07:26 PM

Hey, Diane, I looked up Greenpatch 421 and it looks like good stuff.  Cheap, too.  Thanks for the tip.


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