LMI wood

Cordia rosewood

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Cordia rosewood

Postby John Willman » Thu Jan 11, 2018 4:03 pm

I have some cordia rosewood, also known as Gamboge, which I bought for woodwinds. When the rec order joints are left for some time a grey powder develops on the surface and especially on the bore. I am not sure if it is a reaction to the linseed oil used, or quite what it is. Any observations would be welcome. Thanks.
John.
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Re: Cordia rosewood

Postby Randy Roberts » Fri Jan 12, 2018 7:37 pm

John,

If you have access to or know someone with access, try getting a look under a microscope.
You brought back fond memories of a mystery the forum chased back when we were all much younger...

http://www.mimf.com/library/A_failed_at ... -2006.html

also:

http://www.mimf.com/library/What_to_do_ ... -2009.html
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Re: Cordia rosewood

Postby Bob Francis » Fri Jan 12, 2018 8:09 pm

That was an interesting thread.

my favorite Mr. Tweedy quote is :"I know what you mean, but the proof is in the hyphae. "
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Re: Cordia rosewood

Postby John Willman » Sat Jan 13, 2018 6:40 pm

Many thanks for leading me to the threads. I shall have to try ways of dealing with it, although it does take a long time to re-form when removed. It does look crystaline, and fits in with the second 2009 thread. I suppose the real worry is whether it is harmful in some way.
John
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Re: Cordia rosewood

Postby Chuck Tweedy » Mon Apr 09, 2018 10:39 am

OMG - I forgot how much good information we dug up in that paduk/fungus thread!!
I have nothing new to contribute to this thread - I can't believe that Bob called me "Mr. Tweedy" - Oye!
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Re: Cordia rosewood

Postby Randy Roberts » Tue Apr 10, 2018 11:15 pm

Mr. Tweedy, sir,

Do you remember what the final outcome of the "fishing for fungus" thread was?

I can't for the life of me remember what the punchline ended up being. Or did we even end up with an answer?
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Re: Cordia rosewood

Postby Chuck Tweedy » Thu Apr 12, 2018 6:11 pm

Randy!
The outcome was, unfortunately, nothing more than was in that thread.
My contact at Diversa, my former employer, never completed any genetic analysis of the fungus. Also, I don't beleive that it grew on any "lab media" for him to examine any closer (microscope-wise) than what I could get from the wood itself.
He confirmed from the micrographs that we had that it was certainly a fungus.
I believe that it likely grows in very specific conditions on specific wood (paduk). I have no idea how it survived the conditions that Larry had treated the wood with - other than it could be a ubiquitous species. ¯\_(ツ)_/¯
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Re: Cordia rosewood

Postby Randy Roberts » Thu Apr 12, 2018 7:12 pm

Thanks Mr. Tweed, good to see you checking in.
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Re: Cordia rosewood

Postby Larry Davis » Fri Apr 13, 2018 9:22 pm

Hey, I'm still around, too :) Yes, that pesky fungus still giving me fits with Burmese padauk and Amboyna. Seems the darker the color the more vicious the attack. Never in sapwood and never in orange colors. Freezing the wood for a week helps some.
Larry Davis
Gallery Hardwoods
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Re: Cordia rosewood

Postby David King » Sun Apr 15, 2018 4:07 pm

Larry, do you see the same on vera? That's where I've been getting it but I really think it's more of a crystalline formation and the dust has a very strong odor of the citrus variety, same as the wood. I've read somewhere that vera takes a very long time to dry and can have an MC over 20% for years.
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Re: Cordia rosewood

Postby Mark Swanson » Mon Apr 16, 2018 9:32 am

It's good to see ALL you guys!
    Mark Swanson, guitarist, MIMForum Staff
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Re: Cordia rosewood

Postby Chuck Tweedy » Wed Apr 18, 2018 10:11 pm

It's 106 miles to Chicago, we got a full tank of gas, half a pack of cigarettes, it's dark... and we're wearing sunglasses.
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Re: Cordia rosewood

Postby Bryan Bear » Thu Apr 19, 2018 10:20 am

I'm glad I clicked this thread, it feel like old times.
PMoMC

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