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Disasterous Firing, Work Looks Salt Fired

interiors bumpy

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#1 oldlady

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    single firing an electric kiln to cone 6

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Posted 18 August 2014 - 10:53 AM

having so many successful firings made me careless and even though i learned this lesson years ago, i still fall for the STUPIDITY OF USING A NEW GLAZE ON LOTS OF POTS !  (well, it wasn't really a new glaze, just a new batch.)  see, i am still trying to talk myself into believing that THIS TIME IT WILL WORK RIGHT.  

 

just took everything out and still trying to analyse  the results.  took pictures, will ask neighbor for help posting them.  

 

will refiring them do any good or do i have a lot of new dog bowls?  A LOT OF THEM! :huh:

 

 


"putting you down does not raise me up."

#2 TJR

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Posted 18 August 2014 - 11:42 AM

Oldlady;

It's difficult to say what the problem is without a picture. If you mixed the glaze up yourself, you may have substituted the wrong material. It may be time to get the hammer out.

It has happened to all of us.

You have my sympathies.

TJR.



#3 oldlady

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Posted 18 August 2014 - 02:15 PM

the original glaze recipe called for colemanite.  i have some but used gerstley borate since that was how i made the first batch.  first batch was fine.  maybe i put it on too thin.  looks just like a salt fired piece. 7 bowls, 7 trays assorted other things.


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#4 Denice

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Posted 18 August 2014 - 07:57 PM

Don't feel to bad most of us have had to learn this lesson over and over again.  I don't remember which devastating firing it was but it really sunk in that the big batch of glaze had to be tested despite testing a small batch of it first.     Denice



#5 Mark C.

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Posted 18 August 2014 - 08:01 PM

Salt fired wares rock-maybe you have to view this with different eyes?

gerstley borate for many years as far as out west here replaced colemanite. This material is always a bit shakey as to purities.

Mark


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#6 Pres

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Posted 18 August 2014 - 09:31 PM

I had a load come out like that once, but I knew why. I had fired the bisque to Cone 6 once when I slept in a little late.  Glaze went on thin, even though I sprayed a lot of it on.


Simply retired teacher, not dead, living the dream. on and on and. . . . on. . . .                                                                                 http://picworkspottery.blogspot.com/


#7 oldlady

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Posted 18 August 2014 - 11:17 PM

after looking closely at many of these pots, i think they  simply do not have enough glaze.  in addition, the glaze is not as clear as i had hoped from the tests i have done with it in the past.  even though the green underglaze test shows that the green stays green and does not go grey, i do not like the color of the finished pots.  it is sort of an ivory, not really clear.

 

thanks mark, i do like salt glazed pots but you cannot use a spoon inside these bumpy bowls without reacting like someone hearing chalk screeching on a blackboard.  will get photos posted.

 

pres, i think you are on the right track, these were mostly greenware, some were bisqued pieces from earlier this year, the others were made in the last few weeks.  i always fire greenware to glaze in a single firing, except when bringing pieces north from florida.  they need to be bisqued for the trip.

 

 where they are obviously thickly glazed there are no bumps.  where i added a light coating of oribe green there are no bumps................mystery.

 

anybody need a dog bowl?  my dog has several already.  the cats prefer the river.


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#8 TJR

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Posted 19 August 2014 - 07:29 AM

Planters ?

T.






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