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Roughed out green ash bowl, now finished

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Roughed out green ash bowl, now finished

Postby Andyp » 19 Feb 2017, 13:45

I have never turned wet before and just as the books says it is quick, dust free and easy on the tools but leaves a sodden wet pile of shavings on the bench which have exposed the need for me to seal the MDF top on my router table/lathe stand/bandsaw stand.

Before I put it away to dry should I seal it? If so which surfaces?

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I have another one of these to do plus some wet beech. Cutting these blanks from the logs has also highlighted I need a rip tooth chainsaw blade see post in General Woodworking.
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Re: Roughed out green ash bowl, how to dry?

Postby DaveL » 19 Feb 2017, 17:16

I have only turned a few green bowls, I did not seal them but put each one in a plastic carrier bag. I take them out after a few weeks to let the moist air out and then pop them back. Had no major cracking but some that are well out of round and they needed very careful re-mounting for the second turning session.
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Re: Roughed out green ash bowl, how to dry?

Postby Dalboy » 19 Feb 2017, 20:04

When I rough turn green wood I always seal the outside only with diluted PVA glue and also make sure you turn a slightly over sized tenon to allow for re-turning to refit into the chuck as well as that I make a small dimple in the centre of the tenon to centralise the blank.
I store these in my wooden store area and place sticks between each blank.
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Re: Roughed out green ash bowl, how to dry?

Postby Andyp » 19 Feb 2017, 21:08

DaveL wrote:I have only turned a few green bowls, I did not seal them but put each one in a plastic carrier bag. I take them out after a few weeks to let the moist air out and then pop them back. Had no major cracking but some that are well out of round and they needed very careful re-mounting for the second turning session.


After clearing up the mess Dave I may not be turning wet many more. I think wet turning would work quite well if I could take the lathe outside the workshop. Maybe I will look at making a temporary stand for that purpose.
There are a hundred and one different ways on the interweb of drying partially turned green bowls. I will do a test of the plastic bag approach and partial sealing and see which works best in my storage conditions.
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Re: Roughed out green ash bowl, how to dry?

Postby Andyp » 19 Feb 2017, 21:11

Dalboy wrote:When I rough turn green wood I always seal the outside only with diluted PVA glue and also make sure you turn a slightly over sized tenon to allow for re-turning to refit into the chuck as well as that I make a small dimple in the centre of the tenon to centralise the blank.
I store these in my wooden store area and place sticks between each blank.


Thanks Derek. I will seal the outside with Chestnut End Seal and store with all the unturned lumps I have in the open loft area above the workshop.
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Re: Roughed out green ash bowl, how to dry?

Postby Phil » 20 Feb 2017, 06:56

The bit of wet turning I did many years ago, I wrapped it in newspaper and changed the paper every couple of days.
It would get chucked into a plastic string bag and hung from the rafters till dried out.
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Re: Roughed out green ash bowl, how to dry?

Postby Doug » 20 Feb 2017, 10:05

All you need to do is control the environment the green bowl is stored in, the suggestions above do just that also burying them in a pile of shavings, putting it in a cupboard, wrapping in cling film etc would also achieve this.
All you are trying to do is control the drying process by slowing down the rate water is lost but not stopping it, the only one I've tried is putting a bowl in a paper bag which worked quite well.

Derek's point about marking the centre is an important one as it's the key to re-mounting
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Re: Roughed out green ash bowl, how to dry?

Postby Andyp » 20 Feb 2017, 10:32

Thanks Doug,
last night I marked the centre of the tenon and the centre on the inside of the bowl and coated the outside with end seal. Do you think it will be overkill if I then place some wet shavings inside the bowl and then place in a paper bag?

I really would like this not to split if I can.
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Re: Roughed out green ash bowl, how to dry?

Postby 9fingers » 20 Feb 2017, 14:10

I know virtually nothing about wood turning but I'm sure I read of something somewhere called PEG being used to stop green wood splitting.
I think PEG stands for Poly Ethylene Glycol.

A quick google throws up http://owic.oregonstate.edu/sites/defau ... bs/peg.pdf

Which might be of interest.

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Re: Roughed out green ash bowl, how to dry?

Postby Andyp » 20 Feb 2017, 15:19

Thanks Bob, I had read about PEG but concluded I'd rather keep thinks as natural as possible and I couldn't fine it in the local DIY shed :D

I'd briefly considered zapping it in the microwave too.
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Re: Roughed out green ash bowl, how to dry?

Postby Tusses » 20 Feb 2017, 15:41

I always think outside the box ! lol
I don't do much turning .. but in a situation like this, could you "strap" it up ?
Like coopering a barrel .. metal band it nice and tight , and keep tightening as it shrinks.
Kinda like a giant sized jubilee clip ! (other brand hose clips available)

just a thought :eusa-think:
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Re: Roughed out green ash bowl, how to dry?

Postby Tusses » 20 Feb 2017, 15:44

or some string.rope and a Tourniquet setup ?
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Re: Roughed out green ash bowl, how to dry?

Postby Andyp » 20 Feb 2017, 19:42

Tusses wrote:or some string.rope and a Tourniquet setup ?


Tusses wrote:I always think outside the box ! lol
I don't do much turning .. but in a situation like this, could you "strap" it up ?
Like coopering a barrel .. metal band it nice and tight , and keep tightening as it shrinks.
Kinda like a giant sized jubilee clip ! (other brand hose clips available)

just a thought :eusa-think:


I have read a lot on the subject over the past couple of days and strangely neither of these solutions came to the fore.
Nice ideas though.
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Re: Roughed out green ash bowl, how to dry?

Postby Tusses » 20 Feb 2017, 19:46

ah .. there you go .. I have single handedly revolutionized the wood turning industry ! :lol:
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Re: Roughed out green ash bowl, how to dry?

Postby Woodster » 02 Apr 2017, 15:21

9fingers wrote:I know virtually nothing about wood turning but I'm sure I read of something somewhere called PEG being used to stop green wood splitting.
I think PEG stands for Poly Ethylene Glycol.

A quick google throws up http://owic.oregonstate.edu/sites/defau ... bs/peg.pdf

Which might be of interest.

Bob


This was quite popular some years ago but you don't see it offered much anymore. I gather that the PEG also made turning easier as it acted as a lubricant but I've not tried it myself. I have used washing up liquid though for a difficult piece of wood and that worked well.
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Re: Roughed out green ash bowl, how to dry?

Postby Andyp » 23 Sep 2017, 20:30

After 7 months in a paper bag stuffed with shavings the bowl looked like this.

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As you can see there is a fair amount of discolouration which I guess adds to the character.
Will it be dry enough to finish turning? Well I did anyway.

I'll try and take some decent pictures tomorrow.
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Re: Roughed out green ash bowl, now finished

Postby Andyp » 27 Sep 2017, 13:54

The subtle colour shades caused by mould as the bowl was drying out in the bag do not show up in the images. Perhaps I needed to change the shavings every week or two to prevent this. I do not think I will try this method of drying again. Quite pleased with the shape and finish though.
21.5 cms diameter

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Re: Roughed out green ash bowl, now finished

Postby Dalboy » 27 Sep 2017, 18:44

Looks good Andy try sealing the outside and putting some in stick in a well ventilated yet cool place, you don't get the mould problem then.

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Re: Roughed out green ash bowl, now finished

Postby Doug » 27 Sep 2017, 18:55

Very nice Andy :eusa-clap:

Perhaps the shavings combined with the bag held too much moisture hence the mound, perhaps one or the other next time
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Re: Roughed out green ash bowl, now finished

Postby Andyp » 28 Sep 2017, 06:29

To be honest after the mess the wet shavings made I am not in a hurry to wet turn again.

I do have an increasing stash of round blanks drying above the workshop. There is some more ash and lots of beech that was felled in Feb that I might have a bash at. Hopefully it might be dry enough to part turn without the sodden mess.
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Re: Roughed out green ash bowl, now finished

Postby Doug » 28 Sep 2017, 07:36

Andyp wrote:To be honest after the mess the wet shavings made I am not in a hurry to wet turn again.



I can understand that Andy, I remember being drenched the first time I tried turning green wood, I think I spent longer cleaning up & drying everything than I did actually turning :lol:
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Re: Roughed out green ash bowl, now finished

Postby Dalboy » 28 Sep 2017, 11:04

I know it can mean getting sprayed and a good clean up I really enjoy turning wet wood.
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