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Flame Heat Treating - Another Approach

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#1 DHayashida

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Posted 16 November 2006 - 01:04 PM

1. First split the culm in half length-wise
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2. Break out as much of the internal dam as you can. You can use a chisel and remove all of it if you want
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3. Using a propane torch, start flaming from the middle and work towards the ends. Keep the flame moving, don't linger on one spot too long.
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4. If you see a lot of flame the section isn't done yet
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5. Continue to heat a section (keep the flame moving) until all you have is a glowing red spot and no flame
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6. When you get close to an end you will see the moisture and sap bubbling out of the end grain.
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7. The outside of the culm remains unchanged, even after all that heat applied to the other side.
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user posted image

8. Wire brush off all of the burnt pith
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user posted image

9. The culm is ready to split. I do not do any more heat treating. No oven needed.

#2 Thanhvsn

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Posted 21 June 2007 - 09:52 PM

Dear DHayashida.

How about the heat treating after binding the strips?

**Edited by troutchaser to remove quote and repeat of pictures.

#3 bambooster

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Posted 24 November 2007 - 08:42 AM


How has this "flame heat treating" approach worked for you?? Any disasters? successes? TIA...

#4 Blackstone

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Posted 17 April 2008 - 06:55 AM

I tried this approach yesterday, and it seems like it's impossible to straighten.
It takes forever to heat the node again.Did I do something wrong?Any suggestions would be


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