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From: <Gengcheese_at_aol.com>
subject: [Paddlewise] okoume plywood
Date: Tue, 7 Mar 2000 21:10:00 EST
I am about to built my forth kayak and I've just begun to see that there 
might be grades of okoume plywood (I'm a slow learner). The prices in and 
around Rhode Island range from $39 to $88. a sheet for 3 mm. The highest 
price lumber yard claims theirs is top grade marine. Does anyone know more 
about this so I can compare apples to apples?  The last plywood I got (two 
years ago) was definitely of an lesser quality than years before but it 
didn't occur to me that there might be either different grades or different 
manufacturers. 
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From: <RBHoltKayak_at_aol.com>
subject: Re: [Paddlewise] okoume plywood
Date: Tue, 7 Mar 2000 21:43:14 EST
    Somebody just posted to the CLC forum about a plywood called "meranti."  
They gave this web site for info: http://www.worldpanel.com/ .  Go to 
www.CLCBoats.com and click on the forum, then look for a recent post titled, 
Help.  You might  want to also post this question to the Guillemot bulletin 
board.   If you get an answer off-list, will you post the response here on 
PW?  Thanks.

                            Robb
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From: Alex Ferguson <a.ferguson_at_chem.canterbury.ac.nz>
subject: Re: [Paddlewise] okoume plywood
Date: Wed, 08 Mar 2000 16:59:01 +1300
At 09:10 pm 7/03/00 -0500, you wrote:
>I am about to built my forth kayak and I've just begun to see that there 
>might be grades of okoume plywood

We know it as Gaboon and I'm not surprised at differing grades. Check
whether all the layers are the same thickness, cheaper may have outer
layers thinner than centre layer.

Meranti as mentioned by another poster is a different timber, usually a bit
heavier and there are differing types, red and white.

Though okoume is the wood of preference, I've not used it, we built the
Mac50 from Meranti and the Mist from Fijian kauri. Gaboon would have made
the Mac50 a couple of kilos lighter for another $30 - maybe we should,
maybe not.....

Alex
.
.
Alex (Sandy) Ferguson
Chemistry Department
University of Canterbury
New Zealand
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From: <Bhansen97_at_aol.com>
subject: Re: [Paddlewise] okoume plywood
Date: Thu, 9 Mar 2000 07:53:31 EST
RE: Okume - There certainly are different grades, and I think there's also 
some variation of quality within grades. 

The usually recommended "best grade" is BS 1088, but even within that 
category, quality can differ significantly. The best okume I've had came from 
CLC. With the boat I'm currently completing I deliberately ordered a lower 
grade of ply, and it has worked fine. The differences are that (1) the veneer 
on the lower grades is a hairline thinner and (2) on the lower grades, 
there's a "better side" and a side that's not quite as smooth. That 
"not-so-good" side has a slightly wavy surface, which sometimes isn't even 
noticeable until you sand the surface. 

All those differences mean, when building a kayak, is that (1)you have to be 
a shade more careful when sanding, not to cut through the outer veneer, and 
that (2)you have to be careful, when cutting out your panels, to put the two 
**good** sides together, so they'll be the outside of the boat. 

If you're going to varnish the boat, however, and you have 1/2 of it with the 
"good" side showing and the other half with the lesser side (as I almost did 
once) it will make a cosmetic difference.

OTOH, despite what what was written in a recent Sae Kayaker article, the 
lower grade okume will bend every bit as well as the "good stuff". And if 
you're going to paint the hull, or if you're going to glass the outside, even 
that little bit about putting the two "good" sides together becomes 
unimportant.

Bill Hansen
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