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bending binding-purfling gets kinky http://www-.luthiersforum.com/forum/viewtopic.php?f=10102&t=2729 |
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Author: | Terry Stowell [ Fri Aug 05, 2005 9:38 am ] |
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Bent some coco with w/b/w purflings last night. (.030 or so?) Went like this: tape binding/purflings packet together moisten with towel wrap in moist paper towel wrap all in alum foil with single heating blanket on top, sandwiched between slats: bend at 300*-310* for 10 min, cool 1-2 hours later, repeat heating cycle 2 hours later,remove from bender find kinks upper bout, on the inside mostly clamp in body form to finish drying What caused the purfling kinks? They were only slighly wider than the zoot bindings... ![]() |
Author: | Jeff Doty [ Fri Aug 05, 2005 10:47 am ] |
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Terry, Did you bend it as one big sandwich of binding and purfling, or did you lay them out beside each other? I do mine the latter. Jeff |
Author: | John Mayes [ Fri Aug 05, 2005 10:54 am ] |
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one thing that makes this problem exaggerated is leaving the side purfling full height. If you sand them to .060 or whatever the depth of your channel is then this gets reduced drastically. You can flatten these waves out with a clothes iron though. I show this in my latest binding video, as it is a common occurrence. |
Author: | Terry Stowell [ Fri Aug 05, 2005 11:09 am ] |
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[QUOTE=Jeff Doty] Terry, Did you bend it as one big sandwich of binding and purfling, or did you lay them out beside each other? I do mine the latter. Jeff[/QUOTE] side by side. I'd have liked to sand them to the thickness of the binding, prior to bending. My bindings were pretty warped to begin with, so I had to tape them side by side to get everything to stay in line. So with tape on, I just didn't think it was worth scraping/sanding down, moving the tape etc. ![]() |
Author: | Terry Stowell [ Fri Aug 05, 2005 2:45 pm ] |
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Thanks John, good tip. My binding is .080, and the side purfs are almost .100, kinks don't surprise at that width I guess |
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