from "Scrim"
> "Tony Jeffree"
> >>>"Scrim" wrote
[quoted text clipped - 20 lines]
> just needs to be strong enough to build a box frame for tacking warped 3mm
> plywood to", which pretty much cuts out Balsa I reckon!
> I was hoping there might be some nice online sources. My usual experience
> with travelling to a shop to buy is that it's too much hassle to look at
> alternatives for the cheapest. Add in the travel expenses and paying for
> postage buying online doesn't seem such a pricey alternative.
> I think I'm going to go for 8mm square wood instead of the 6mm I originally
> chose. The stronger the better, but not at any cost.
I would suggest that you are on a hiding to nothing with this project.
The warp in 3mm Plywood will be much stronger than any 6 or 8mm square
timber of any specie will be able to correct.
You haven't said how 'warped' the plywood is, or it's other dimensions,
so it is difficult to offer any good advice but if you can find 12 or
15mm square Ramin you might have a chance.
Ramin is what all small mouldings & dowels used to be cut from up to
about 20 years ago but due to excessive harvesting is now restricted.
Balsa (ochroma lagopus) is an oddity as far as being a 'hardwood' is
concerned. The quick and dirty method of determining 'Hard' or 'Soft'
wood is that Evergreen is 'Soft' and Deciduous is 'Hard' but Balsa is
described as Evergreen or 'dry season deciduous if the dry season is
long'. It's 'strength to weight ratio' is its prime benefit.
JG
Scrim - 30 Apr 2008 17:18 GMT
> from "Scrim"
>> "Tony Jeffree"
[quoted text clipped - 50 lines]
>
> JG
Thanks to all (except :Jerry:) for the helpful contributions,
Scrim
<snip>
> I was hoping there might be some nice online sources. My usual
> experience with travelling to a shop to buy is that it's too much
> hassle to look at alternatives for the cheapest.
Moron!