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| Tips, Techniques, and Questions -- Technical questions or tips |
2014-08-12, 4:00pm
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Member
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Join Date: Jan 15, 2007
Posts: 38
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Mandrel release help
I having been using Foster Fire for several years now and had no issue....I just purchased some large hole mandrels (1 1/2 inches) and the release will not stick to them...ahhhhhhh!!! Tried everything....thinnin, thickening, more heat, less heat and it keeps pulling off the mandrel....any suggestions??
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2014-08-12, 4:14pm
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Loving learning
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Join Date: Oct 11, 2010
Location: Florida
Posts: 11,653
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Did you do anything to the mandrels before using them? Heat them in the torch, or use a bit of steel wool to give them a bit of "tooth"?
I've never used mandrels that large, so don't really know.
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My current "hot" fantasy involves a senior discount on glass & tools!
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2014-08-12, 4:14pm
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Member
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Join Date: Jul 20, 2008
Location: Port Angeles, WA
Posts: 77
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Try roughing up your mandrels with fine sandpaper prior to use
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2014-08-12, 6:49pm
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Member
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Join Date: Jan 15, 2007
Posts: 38
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Awesome!!!! Gonna give that a try!! Thanks so much!!
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2014-08-12, 9:17pm
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Senior Member
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Join Date: Apr 08, 2011
Location: NC
Posts: 1,687
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Put your mandrels through an anneal cycle and it will remove all traces of oil and dirt. Ready to use!
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Barbara
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2014-08-13, 2:32pm
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I'm kinda biz-EE
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Join Date: Aug 08, 2007
Location: Arlington, TX
Posts: 3,610
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Yep, I always run my mandrels through the kiln once before using, ready to go!
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Astrid
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2014-08-13, 7:10pm
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SCIENCE Teacher!
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Join Date: Jul 19, 2005
Location: Wylie, TX
Posts: 2,140
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There can be a fine film of oil on them when they are new. I don't remember what I did it mine, but I vaguely recall Dawn dishwashing soap and then an anneal cycle.
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