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Interesting observation on a Torrified top: Light Ghosting
http://mowrystrings.luthiersforum.com/forum/viewtopic.php?f=10101&t=52008
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Author:  jfmckenna [ Wed Jun 05, 2019 8:58 am ]
Post subject:  Interesting observation on a Torrified top: Light Ghosting

You know how you can stick a bright light inside the guitar and see the bracing patterns ghost through?

This is a standard Carpathian Spruce top for example:

Image

I stuck the same bulb in a guitar I am building today and I won't even bother taking a picture of it. It's completely black. There is no light at all coming through the torrified Red Spruce top and this spruce top is .1in thick.

I thought that was interesting and you might think the same.

Author:  bluescreek [ Wed Jun 05, 2019 10:08 am ]
Post subject:  Re: Interesting observation on a Torrified top: Light Ghosti

this is what happens to old wood and torrified wood. Dick Boak showed that 6 years ago at the ASIA symposium when Martin started using this. It is interesting, it is the hemocellulous cell structure that changes. The old wood from my old 1800 martins are the same. Very interesting to see for the first time.

Author:  jfmckenna [ Wed Jun 05, 2019 12:12 pm ]
Post subject:  Re: Interesting observation on a Torrified top: Light Ghosti

Yeah I was pretty fascinated by that. I've got a few vintage guitars from the 20's I need to check out with the light just to see.

Author:  Ruby50 [ Wed Jun 05, 2019 6:58 pm ]
Post subject:  Re: Interesting observation on a Torrified top: Light Ghosti

On the other side, this is Alaskan Yellow Cedar as the sun went down

Author:  jfmckenna [ Thu Jun 06, 2019 8:35 am ]
Post subject:  Re: Interesting observation on a Torrified top: Light Ghosti

Give it another hundred years Ed and it will be dark as night :D

Author:  jfmckenna [ Fri Jun 07, 2019 7:14 am ]
Post subject:  Re: Interesting observation on a Torrified top: Light Ghosti

Another observation about torrified tops I found yesterday is that when you screw up and dent the top steaming the dent doens't do a darn thing. The wood simply will NOT expand under hot steam. Which sux because now I'm in a pickle.

Author:  SteveSmith [ Fri Jun 07, 2019 8:19 am ]
Post subject:  Re: Interesting observation on a Torrified top: Light Ghosti

jfmckenna wrote:
Another observation about torrified tops I found yesterday is that when you screw up and dent the top steaming the dent doens't do a darn thing. The wood simply will NOT expand under hot steam. Which sux because now I'm in a pickle.


Good to know, I just got my first torrefied top from Bob C. to use in my next build. I've used some torrefied maple and found that it doesn't bend as well and is somewhat brittle.

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