Subject: pau ferro oily?

From: Jeffrey Silverman <[email-masked]>
Date: Mon, 10 Feb 1997 13:53:36 -0800

Anyone have significant experience working with pau ferro? I glued up 
some thin panels then laminated them to maple using Titebond II and many 
of the seams and laminations came appart. Is the wood particularly oily 
so that I should have use a polyurethane or epoxy glue?

Thanks 
Jeff

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From: [email-masked] (John Paquay)
Date: 11 Feb 1997 21:28:00 GMT

In article <[email-masked]>, [email-masked] says...
>so that I should have use a polyurethane or epoxy glue?

I wouldn't consider Pau Ferro to be particularly oily -- doesn't seem to
be any more so than walnut, for example.  It is an extremely hard and
dense wood, though, which makes it susceptible to warping when wet,
especially in thin pieces, as you describe.  I suspect that it's the II
in the Titebond that might be causing the problem.  It's a really thin
mixture, lower solids than regular Titebond, and more water.  I haven't
seen tests, but my experience has been that it has a lower bond strength
and lower inherent strength than 'regular' AR adhesives. Fit and clamping
pressure are fussier with T-II, since it can't fill gaps as well as regular.

A lot of conjecture here, no facts.

-- 
John Paquay
[email-masked],  [email-masked]
http://www.physics.purdue.edu/~jep/
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