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28th August 2019, 04:33 PM #1Senior Member
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Advice needed regarding cupping on a piece of Spotted Gum.
Have a great looking piece of Spotted Gum which was destined to be a box lid. Since being cut to size it has cupped 3.5 mm over a width of 210mm. Can this be redeemed and if so how. Any and all advice appreciated. Brian.
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28th August 2019, 04:42 PM #2SENIOR MEMBER
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- Jul 2014
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How was it stored? If you put it cupped side down in the sun (not that there is much sun today) it may flatten out again. Was the last cut a resaw or plane down to final thickness?
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28th August 2019, 09:28 PM #3Taking a break
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- Aug 2008
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- Melbourne
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- 34
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- 6,127
Timber will tend to cup away from whatever surface it's sitting on; a little bit of water on the cupped side can help as well, but you can send it too far the other way so it's a bit of a guessing game.
At my old work we'd sometimes de-cup whole table tops by wetting the cupped side and leaving it on the ground over night.
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29th August 2019, 04:38 PM #4Senior Member
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- Jun 2011
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- Bongaree, Queensland
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- 84
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Hi Alkahestic, the piece has been stored flat on shelf for about 5 months. It was cut from a longer length just a short while after I got it and was finish machined just needing a light sanding. The rest of the original length has been used without any problems. Thanks for the reply. Brian.
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29th August 2019, 04:44 PM #5Senior Member
- Join Date
- Jun 2011
- Location
- Bongaree, Queensland
- Age
- 84
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- 162
Hi Elanjacobs, Thanks for your reply, will try the water treatment and if no success will probably finish it life a firewood. Thanks again. Brian.
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