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Author Topic: Heat and Ipe (pic added)  (Read 5579 times)

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Offline NTD

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Heat and Ipe (pic added)
« on: March 15, 2011, 12:24:53 am »
I have a pre tapered slat of ipe that developed some substantial twist while in storage.  I decided to try to correct it with some heat.  I clamped it to another board and gave it some light heating.  Almost immediatly the wood started sweating a black tar like substance.  It's pretty incredible.  Has anyone else seen something like this?

« Last Edit: March 15, 2011, 12:43:09 am by NTD »
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Nate Danforth

Offline M-P

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Re: Heat and Ipe
« Reply #1 on: March 15, 2011, 12:28:21 am »
No, but I don't think I've ever heated ipe with a heat gun.   Ron
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Offline Marc St Louis

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Re: Heat and Ipe
« Reply #2 on: March 15, 2011, 12:36:18 am »
Yes.  You don't want to heat Ipe too much, it doesn't like it
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Offline NTD

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Re: Heat and Ipe
« Reply #3 on: March 15, 2011, 12:38:23 am »
Marc,

I remember you saying something about that but the twist in this board was so much that I wasn't willing to make a bow with it as is.  I kept the gun moving pretty quickly, bout 10 seconds in a spot at a time.  Do you think that'll give me problems?
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Nate Danforth

Offline mullet

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Re: Heat and Ipe (pic added)
« Reply #4 on: March 15, 2011, 12:46:54 am »
  Yep' what Marc said. It will split and splinter. I have a nice piece that I want to try and bend, like a stave. I had a long pipe made that I can immerse the one whole limb in. I'm going to try and heat and/or boil if I have to, in vegetable oil.
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Offline Pat B

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Re: Heat and Ipe (pic added)
« Reply #5 on: March 15, 2011, 01:02:08 am »
I don't know this for a fact but I've heard that heat doesn't work with tropical woods(dry or wet) but some sort of a chemical treatment does. If it were me, I'd scrap that piece and find another.   Before you know it we'll have to wear hazmat suits to build bows.  ;D
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Offline NTD

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Re: Heat and Ipe (pic added)
« Reply #6 on: March 15, 2011, 01:05:40 am »
I know it was a hail mary but figured I'd give it a try...... ;)
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Nate Danforth

Offline ken75

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Re: Heat and Ipe (pic added)
« Reply #7 on: March 15, 2011, 01:26:37 am »
glad for this post i have considered heating it . Nate that tar might be what makes it water and bug resistant
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Offline Timo

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Re: Heat and Ipe (pic added)
« Reply #8 on: March 15, 2011, 01:34:54 am »
Nate, the ipe I built last year didn't have the same result. I built in some re curves and used a good bit of heat on them, Nothing showed up like that!

But....on my recent persimmon bow I had a bunch of those dots show up. I figured it was sap that rose to the top? Looked like fly crap.
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Offline NTD

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Re: Heat and Ipe (pic added)
« Reply #9 on: March 15, 2011, 01:35:10 am »
Quote from: ken75 on March 15, 2011, 01:26:37 am
glad for this post i have considered heating it . Nate that tar might be what makes it water and bug resistant

That's likely Ken, my wife also said it's probably what makes people sick too... :-\
« Last Edit: March 15, 2011, 01:23:47 pm by NTD »
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Nate Danforth

Offline Stiks-N-Strings

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Re: Heat and Ipe (pic added)
« Reply #10 on: March 15, 2011, 01:06:11 pm »
I heated a piece of jatoba once and it proved fatal. Made it like rubber almost, craziest thing I ever seen. From everything I've been told or experienced heat is a no-no on tropical wood.
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Offline Marc St Louis

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Re: Heat and Ipe (pic added)
« Reply #11 on: March 15, 2011, 01:47:30 pm »
There are some tropicals that bend with dry heat.  Pernambuco (used for making violin bows) does and so does Satinwood.  Bubinga, Brazilian Rosewood and Ipe don't and a few others also
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Offline NTD

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Re: Heat and Ipe (pic added)
« Reply #12 on: March 15, 2011, 01:53:20 pm »
Quote from: Timo on March 15, 2011, 01:34:54 am
Nate, the ipe I built last year didn't have the same result. I built in some re curves and used a good bit of heat on them, Nothing showed up like that!

But....on my recent persimmon bow I had a bunch of those dots show up. I figured it was sap that rose to the top? Looked like fly crap.

That's interesting Tim.  I have a few scrap pieces from other ipe bows and such, I'm going to heat em up and see what happens. 

I don't think I hurt this piece of ipe.  The slat is now quite straight and I don't see any cracks, splinters, or checking.  I didn't let it get very hot, 10 seconds at a time, definitely wasn't "heat treating" it :D
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Nate Danforth

Offline Bevan R.

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Re: Heat and Ipe (pic added)
« Reply #13 on: March 15, 2011, 02:30:35 pm »
I would let it set for a week or 2 before you do anything else to it. Just to let it rest and rehydrate.

Bevan R
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Offline Ryano

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Re: Heat and Ipe (pic added)
« Reply #14 on: March 15, 2011, 03:24:06 pm »
Ive actualy heated ipe quite a bit with no ill effects. It will heat bend ok as in like a slight gentle curve like reflexing a bow limb more sharp bends don't seem to work as well as other woods. Never had the black tar...
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