Aluminium is good! Maybe he's doing a reso...
How thick is the aluminium?
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| taking the warp out of brazilian backs. http://luthiersforum.com/forum/viewtopic.php?f=10101&t=37272 |
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| Author: | Michael Keller [ Sun Jul 29, 2012 2:59 pm ] |
| Post subject: | taking the warp out of brazilian backs. |
There was this beautiful set of brazilian that was warped beyond use at all, and I decided to apply basic guitar bending skills to it. I got two sheets of aluminum and put them in my kitchen oven at 280.After twenty minutes I took them out and slid both rosewood back blanks in between .With light pressure down on the top aluminum sheet I was able to slowly get the sheets to flaten out. A bunch of small clamps were slowly added and the whole thing went back into a 290 over for 25 minutes. Took it out and let it cool for 3 hours, unclamped it and the wood is perfect! dead flat. I did this about 6 years ago to another set of brazilian and the guitar back is still dead flat. It works.[img][IMG] |
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| Author: | Heath Blair [ Sun Jul 29, 2012 3:22 pm ] |
| Post subject: | Re: taking the warp out of brazilian backs. |
Thanks for sharing your process, but no one wants to see the shot of aluminum laying on your stove. Where's the Braz, dude?! |
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| Author: | Clay S. [ Mon Jul 30, 2012 7:51 am ] |
| Post subject: | Re: taking the warp out of brazilian backs. |
Aluminium is good! Maybe he's doing a reso... How thick is the aluminium? |
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| Author: | Michael Keller [ Mon Jul 30, 2012 9:47 am ] |
| Post subject: | Re: taking the warp out of brazilian backs. |
Here is a photo that shows the very bad warp. Its warped in two directions!  michael keller http://www.kellerguitars.com |
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| Author: | Michael Keller [ Mon Jul 30, 2012 9:52 am ] |
| Post subject: | Re: taking the warp out of brazilian backs. |
THe top sheet is 1/4 and the bottom sheet is 3/16. got them from a local machine shop from their scrap bin. A photo of the back veneer.  michael keller http://www.kellerguitars.com |
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| Author: | Rollo [ Mon Jul 30, 2012 1:06 pm ] |
| Post subject: | Re: taking the warp out of brazilian backs. |
Thanks for the great tip Michael! At what temperature do you bend the brazilian sides, 280/290? Let us know when the guitar is finished, I would enjoy seeing it! aloha, Rollo |
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| Author: | ugly guitars [ Mon Jul 30, 2012 7:15 pm ] |
| Post subject: | Re: taking the warp out of brazilian backs. |
Wow thats great, my guitar making teacher Bill Kelday told me a story about a guy he knew who had the same problem with his set of Brazillian Rosewood, his solution was to book into a hotel and use the the large built in trouser press with great results, 
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| Author: | David LaPlante [ Mon Jul 30, 2012 8:01 pm ] |
| Post subject: | Re: taking the warp out of brazilian backs. |
I've used a flat iron to iron these through a moist towel and then clamp flat while still hot.....worked well. |
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