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Author Topic: Wood storage humidity/humidifier questions?  (Read 1861 times)

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Offline Steve

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Wood storage humidity/humidifier questions?
« on: May 26, 2005, 06:05:57 PM »
I have recently moved from Hawaii where low humidity was never a problem. Now I am in an area where it may be. I have a lot of thin stock (1/8") that is affected by this lower humidity. As low as 30% so far. More than the low nummbers it seems the fluctuation from morning to heat of the day tends to cause cupping in unstickered stock that is laying about the shop.
I am thinking that I would like to install a humidifier that would keep this 1,000 sq. ft. space at a constant humidity of say 50%.
I appreciate any input from the knowledgeable and experienced amoung you.

Thanks
Steve

The wood I'm dealing with is in 8/4" thickness and has been airdrying for minimum 3 years but in an environment of 80% humidity.
Although I try to keep my inventory on stickers there is always some that is waiting.
Steve
Hawaiian Hardwoods Direct
www.curlykoa.com

Offline Den Socling

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Re: Wood storage humidity/humidifier questions?
« Reply #1 on: May 27, 2005, 07:13:38 AM »
Steve,

I suppose that a very gentle 'predryer' setting would work. An EMC around 14 or 15% will slowly remove moisture. If your shop is 75'F, then 75% would set the EMC 14.3%. If the humidity was 50%, EMC is closer to 9%. Since your wood was air dried in Hawaii, it's MC would be in the upper teens, I would guess.

Who's left to cut Koa?

Den

Offline Steve

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Re: Wood storage humidity/humidifier questions?
« Reply #2 on: May 28, 2005, 10:14:08 AM »
Thanks Den

Could I do this with a home humidifier or would I need something more commercial? It was 93 here yesterday!
You're right about the MC of my 8/4. 18% or so is about as low as it would go in Hawaii.
I have my new wood stickered in the basement and it seems to be doing fine. Drying but slowly.

As far as who's cutting Koa. I'm afraid anyone that can get stumpage will cut it up. Sometimes it isn't pretty either. There are a few knowledgeable sawyers there but I'm  aftraid that a lot of Koa is getting buggered up by that think a board is a board. I have seen a lot of figure get flatsawn. I really hate to see that.

I did manage to come away with some nice wood though.
Steve
Hawaiian Hardwoods Direct
www.curlykoa.com

Offline Fla._Deadheader

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Re: Wood storage humidity/humidifier questions?
« Reply #3 on: May 28, 2005, 11:48:30 AM »

 Steve, could you elaborate a little on yer statement, about figured wood being flatsawn???  How's the best way to saw figure if not flatsawn???   Thanks
All truth passes through three stages:
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   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline Curlywoods

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Re: Wood storage humidity/humidifier questions?
« Reply #4 on: May 28, 2005, 05:52:56 PM »
Harold,

  If a log has really nice figure (curly figure) it is always best to quarter saw for maximum effect and uniformity of the figure across the face of the lumber.  Flat sawn figured woods do not generally provide the even and  consistent look that quarter sawning does.  Most all musical instrument grade curly logs are quarter sawn for the stabilty, but to also maximize the consistency and uniformity of the figure.
All the best,

Michael Mastin
McKinney Hardwood Lumber
McKinney, TX

Offline Fla._Deadheader

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Re: Wood storage humidity/humidifier questions?
« Reply #5 on: May 28, 2005, 06:36:06 PM »

  Thanks Mike.  Don't wanna mess up that spensive CR Stuff, EH ???  ;D ;D
All truth passes through three stages:
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   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)

Offline Steve

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Re: Wood storage humidity/humidifier questions?
« Reply #6 on: May 28, 2005, 06:57:16 PM »
Yeah

Now I speak of curly figure, some other figures may show up flat sawn but not curly. I shows up best when quartered much like the rays in Oak from what I understand. The curly figure that is sometimes found in Koa is almost non existant when flat sawn. I mentioned  your Mango, definitely quarter that and you will see a lot more figure.
From what I've seen figure like Birdseye is best when flatsawn. There are some others with Oak, which Im not familiar with, like quilted. I think that is best when flatsawn. I had a MD for, *DanG near, ever and I got to the point where I wouldn't cut anything except quartersawn.
The design of bandsaws, from what I've seen, makes cutting quartersawn, a bit more complicated but definitely doable once you get the process down. You just can't keep rolling the log and slabing off a face or you will end up with pure flatsawn. I'm sure there are woods where that is perfectly fine, I just haven't been sawing them.

Just the way I saw it.

Steve
Steve
Hawaiian Hardwoods Direct
www.curlykoa.com

Offline Curlywoods

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Re: Wood storage humidity/humidifier questions?
« Reply #7 on: May 28, 2005, 07:41:11 PM »
Steve makes good points.  When I think of figured wood, I first think of curly figure.  Now if it is quilted figure, flat sawn is the way to cut this for maximum effect and beauty.  I often forget about Bird's Eye Maple, even though we sell that too  :D

  Many people call crotch wood as a type of figure, but to my way of thinking, figured wood is the genetic defects like curl (flame and fiddleback), quilt and bird's eye.  These are the most common types of figure.

 
All the best,

Michael Mastin
McKinney Hardwood Lumber
McKinney, TX

Offline Fla._Deadheader

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Re: Wood storage humidity/humidifier questions?
« Reply #8 on: May 28, 2005, 08:16:57 PM »

 That's why I'm considerin a Swinger.  ;) ;D
All truth passes through three stages:
   First, it is ridiculed;
   Second, it is violently opposed; and
   Third, it is accepted as self-evident.

-- Arthur Schopenhauer (1788-1860)


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