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Bisque Wrapped In Newspaper For A Very, Very Long Time

newspaper ink residue

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#1 ceramix

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Posted 13 August 2013 - 11:21 AM

Yipeee......Finally about to glaze some pots that have sadly sat wrapped in newspaper for a very, very long time. I expect a resist or residue from the ink....yes? Shall I re-fire at a low temp to burn these oils off? How hot do you think?

thanks



#2 trina

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Posted 13 August 2013 - 11:34 AM

Are you planning on dipping them? If so I'd dip see what it looks like and if the coverage looks good I would fire them. You can always wash off the dipped glaze if you think they aren't coated enough and then refire, I would imagine you only need to go into the 400's C to burn off any oil. T

#3 neilestrick

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Posted 13 August 2013 - 11:36 AM

Ditto. Take a good look at them and try the one that looks the worst. A quick firing to 1000F should do it to clean them off.


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#4 ceramix

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Posted 13 August 2013 - 12:01 PM

I was hoping I didn't have to go that high. Not sure about how I will glaze. Just beginning glaze tests now. Ok thanks 



#5 Chris Campbell

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Posted 13 August 2013 - 12:05 PM

Define "very long time"... Weeks? Months? Years? 

How damp is the place they have been sitting?

Over time bisque ware tends to absorb water from the air around it, so the speed of the firing will depend on how long they have been sitting and where.


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#6 ceramix

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Posted 13 August 2013 - 12:16 PM

Well, their location has changed over the course of YEARS.  LOL  They had been wrapped initially for 20 years....I kid you not....in the basement. They have been sitting out in the studio/garage for a year while I've considered what to do with them. I laugh at the moisture question, I live on Long Island and it's pouring out. I re-fired a load yesterday and some of them developed small 1/4" gray dots, like shadows, flat no texture. I only took it to barely red heat and shut it off. 



#7 trina

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Posted 13 August 2013 - 12:18 PM

what is red heat...

#8 neilestrick

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Posted 13 August 2013 - 12:27 PM

what is red heat...

 

1000F+


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#9 trina

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Posted 13 August 2013 - 12:43 PM

what is red heat...

 
1000F+


never heard that expression... :) T

#10 ceramix

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Posted 13 August 2013 - 01:07 PM

well, I guess I will pick out the worst one as recommended and give it a whirl. 

thanks



#11 Bob Coyle

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Posted 13 August 2013 - 01:41 PM

Don't fire them again. Just wash them good with detergent. Use a scrub brush. There should be nothing in newsprint that would be left after scrubbing.  Then let them dry out and glaze them.



#12 Mark C.

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Posted 13 August 2013 - 01:57 PM

My wifes sister gave her some pots she made in school-over 30 years ago-we glazed them and fired them without any of this fretting they where wrapped in old newspapers-no issues-they where high fire clay(cone 10)

Mark


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#13 TJR

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Posted 13 August 2013 - 02:04 PM

I think the only issue here would be dust, which could cause your glaze to crawl. I would dip then in a 5 gallon bucket of water, then right out again. Let them dry over-night, then glaze.If you are in a humid part of the country, you could use a fan to dry them, but this sounds like a bit much as far as work.

TJR.



#14 GEP

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Posted 13 August 2013 - 02:05 PM

I say glaze and fire them and don't worry. If the newspaper or the elapsed time have any effect on the finished pots, well that's just part of the story of those pots.


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#15 TJR

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Posted 13 August 2013 - 02:08 PM

 

 

what is red heat...

 
1000F+


never heard that expression... :) T

 

TRINA;

This a techical term for colour in the kiln. Back in the day, lots of potters did not use cones to fire their bisque,and shut her down when they attained a good red heat. I have done this myself. Takes experience, but it works.Potters didn't used to use cones. In a glaze firing, they would have draw rings that had various glazes on them. These would be pulled out periodically, dunked in water andchecked for glaze development and reduction.

TJR.



#16 ceramix

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Posted 13 August 2013 - 02:32 PM

Only some of the pots got these crazy dots. I attached a close up of the dots after the re-fire. They were not there prior. Difficult surface to shoot.

Guess I've had them in limbo for so long I'm over thinking them.

thanks everyone,

I will just scrub them and see what happens. I've attached a 

Attached Files



#17 Mark C.

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Posted 13 August 2013 - 02:33 PM

(Potters didn't used to use cones)

Hey they still skip it these days as well

I have not used a bisque cone in my gas car kiln in over 30 years-eyeball and pyro good enough.

You just learn the color by eye-you can see this best where the wares touch the shelve I feel.

Mark


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#18 Mark C.

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Posted 13 August 2013 - 02:35 PM

holy bat mobile or in this case pot mobile-nice brent rack.

Mark


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#19 ceramix

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Posted 13 August 2013 - 02:38 PM

my studio is sooo small I need sturdy mobility with lots of options.

What about those dots....what are they?



#20 ceramix

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Posted 13 August 2013 - 02:41 PM

This is a light buff body, I can't imagine what it could be.

I don't think iron,,,,any thoughts?

 

Lee






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