ceramix Posted August 13, 2013 Report Share Posted August 13, 2013 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 Link to comment Share on other sites More sharing options...
trina Posted August 13, 2013 Report Share Posted August 13, 2013 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 Link to comment Share on other sites More sharing options...
neilestrick Posted August 13, 2013 Report Share Posted August 13, 2013 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. Link to comment Share on other sites More sharing options...
ceramix Posted August 13, 2013 Author Report Share Posted August 13, 2013 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 Link to comment Share on other sites More sharing options...
Chris Campbell Posted August 13, 2013 Report Share Posted August 13, 2013 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. Link to comment Share on other sites More sharing options...
ceramix Posted August 13, 2013 Author Report Share Posted August 13, 2013 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. Link to comment Share on other sites More sharing options...
trina Posted August 13, 2013 Report Share Posted August 13, 2013 what is red heat... Link to comment Share on other sites More sharing options...
neilestrick Posted August 13, 2013 Report Share Posted August 13, 2013 what is red heat... 1000F+ Link to comment Share on other sites More sharing options...
trina Posted August 13, 2013 Report Share Posted August 13, 2013 what is red heat... 1000F+ never heard that expression... T Link to comment Share on other sites More sharing options...
ceramix Posted August 13, 2013 Author Report Share Posted August 13, 2013 well, I guess I will pick out the worst one as recommended and give it a whirl. thanks Link to comment Share on other sites More sharing options...
Bob Coyle Posted August 13, 2013 Report Share Posted August 13, 2013 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. Link to comment Share on other sites More sharing options...
Mark C. Posted August 13, 2013 Report Share Posted August 13, 2013 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 Link to comment Share on other sites More sharing options...
TJR Posted August 13, 2013 Report Share Posted August 13, 2013 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. Link to comment Share on other sites More sharing options...
GEP Posted August 13, 2013 Report Share Posted August 13, 2013 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. Link to comment Share on other sites More sharing options...
TJR Posted August 13, 2013 Report Share Posted August 13, 2013 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. Link to comment Share on other sites More sharing options...
ceramix Posted August 13, 2013 Author Report Share Posted August 13, 2013 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 Link to comment Share on other sites More sharing options...
Mark C. Posted August 13, 2013 Report Share Posted August 13, 2013 (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 Link to comment Share on other sites More sharing options...
Mark C. Posted August 13, 2013 Report Share Posted August 13, 2013 holy bat mobile or in this case pot mobile-nice brent rack. Mark Link to comment Share on other sites More sharing options...
ceramix Posted August 13, 2013 Author Report Share Posted August 13, 2013 my studio is sooo small I need sturdy mobility with lots of options. What about those dots....what are they? Link to comment Share on other sites More sharing options...
ceramix Posted August 13, 2013 Author Report Share Posted August 13, 2013 This is a light buff body, I can't imagine what it could be. I don't think iron,,,,any thoughts? Lee Link to comment Share on other sites More sharing options...
Pugaboo Posted August 13, 2013 Report Share Posted August 13, 2013 Wasn't there a subject awhile back where someone was having an issue with dark spots appearing on there ware? I tried doing a search to find it but the search engine here hates me I think someone under that subject mentioned it might be something called mildew and that it came from under fired bisque or something. Or maybe it was moisture in the piece that caused the mildew that only appeared once fired. Like I said I tried to find the subject again but couldn't. Maybe someone here that has gotten the search engine to like them can do a search and find it? Sorry that probably no help at all. Terry Link to comment Share on other sites More sharing options...
ceramix Posted August 13, 2013 Author Report Share Posted August 13, 2013 That is interesting about the lead. It was 1992. LOL.... I wonder? I'm going to try scrubbing them before I re-bisque any more. I don't think mildew cause it wasn't there before I re-fired, yesterday. I'm gonna glaze test on a small pot in a test kiln and cross my fingers. I'll have to but a little kiln god on it and do a little dance. The dance is optional..... Link to comment Share on other sites More sharing options...
Idaho Potter Posted August 13, 2013 Report Share Posted August 13, 2013 I had some pots that students left and so I used them for glaze testing. Some of them had spots like that after bisque firing. That caused problems as the glaze did not fire well. I finally decided the clay had grown a crop of organics while sitting wrapped in newspaper. A higher bisque cone took care of my problem. Your problem will let you know if you guess wrong. Shirley Link to comment Share on other sites More sharing options...
ceramix Posted August 14, 2013 Author Report Share Posted August 14, 2013 Hi Shirley, Do you remember how high you had to bisque? I think these were originally fired to 07. Lee Link to comment Share on other sites More sharing options...
Pres Posted August 14, 2013 Report Share Posted August 14, 2013 I had a mother of a student who had gone to bfa at Carnegie Melon give me a bunch of his bisqued pieces after he died in his late 30's. They sat in my room for a few years while I tried to best figure how to get rid of 20 pieces in the best way. In the end one of my adult classes heard the story, we cleaned them up, after unpacking from newspaper 10 yrs old, and then glazed and fired. We had a little memorial party and everyone had a piece to take home. Link to comment Share on other sites More sharing options...
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