Primitive Archer

Main Discussion Area => Bows => Topic started by: Prarie Bowyer on September 22, 2014, 09:25:27 pm

Title: Can wood rehydrate?
Post by: Prarie Bowyer on September 22, 2014, 09:25:27 pm
So I've steamed and cooked the crap out of an elm stave trying to straighten it From a trusted banana shape.

Need to devise a better process but it is getting there.  I've got a few cracks started at the tip, in the belly and on the side.  I think they will be worked out so I'm continuing with the bow.  This was mostly about learning to bend problem wood so I'm not loosing sleep.

But if it can make a bow I'd like it.  Can rehydrating be accomplished and even accelerated?
Title: Re: Can wood rehydrate?
Post by: PatM on September 22, 2014, 09:30:55 pm
Of course. The damper the environment the faster the wood will re-hydrate.
Title: Re: Can wood rehydrate?
Post by: Prarie Bowyer on September 22, 2014, 09:32:52 pm
I didn't know if there was a point of no return. :-\
Title: Re: Can wood rehydrate?
Post by: Hrothgar on September 22, 2014, 10:01:07 pm
In a semi-natural state wood gives up and takes in moisture throughout its life. But after its been heat treated, toasted etc. I think there is a limit. Seems like I've read or been told that when wood gets up around 160-170 degrees something irreversible happens to the cells. Don't quote me on this.
Title: Re: Can wood rehydrate?
Post by: PatM on September 22, 2014, 10:44:12 pm
It can always take up or lose moisture. Still, it does end up being the raisin/grape analogy.
Title: Re: Can wood rehydrate?
Post by: Pat B on September 22, 2014, 11:18:28 pm
Wood is hygroscopic, meaning it takes on moisture and gives off moisture as the relative humidity goes up and down. Even after wood rots down to humus it still takes on and gives off moisture as the R/H changes.
Title: Re: Can wood rehydrate?
Post by: Prarie Bowyer on September 23, 2014, 01:42:17 pm
So how do I speed it up?
Title: Re: Can wood rehydrate?
Post by: Del the cat on September 23, 2014, 01:46:01 pm
So how do I speed it up?
Chuck it in a river ::) ;)
Or leave it in bath/shower room.
Del
Title: Re: Can wood rehydrate?
Post by: bradsmith2010 on September 23, 2014, 01:57:03 pm
it will probably be fine if you let it set for a week,,, but you can floor tiller and shape now
Title: Re: Can wood rehydrate?
Post by: DC on September 23, 2014, 03:10:03 pm
Buy a scale that is accurate to a gram or less. Weigh it every day. If the weight is going up it's still rehydrating.