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Wood won't stop growing!

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Forum topic by 1goldsniper posted 223 days ago 571 views 0 times favorited 3 replies Add to Favorites Watch
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1goldsniper

7 posts in 603 days


223 days ago

I made a couple of the 30 degree/walnut,purple heart,maple cutting board that has the 3 dimensional effect. No problem and it turned out good. Problem is wood will not stop growing it appears. After coating with olive oil multi coats. after a month or two the walnut boarder on one will grow length wise about a thirty/second of and inch. On the other most of the blocks are about a paper dollar thickness thicker. Blocks are not end grain but straight grain. What am I doing wrong?


3 replies so far

View richardwootton's profile

richardwootton

1043 posts in 540 days


#1 posted 223 days ago

I really want to say, “that’s what she said,” but that doesn’t answer your question. I’m guessing it has to do with the difference with which each of the types of woods moves with moisture. Different species will move more than others as the moisture content changes.

-- Richard, Hot Springs, Ar -- Galoot In Training

View tefinn's profile

tefinn

1197 posts in 1022 days


#2 posted 223 days ago

i agree with Richard. Your wood is moving as it dries or absorbs moisture from the air.

I noticed you say you coated with olive oil. Why? Olive oil and other vegetable oils go rancid and shouldn’t be used. Use mineral oil (either from the drug store or food grade if you can get it) or one of the finishes made for cutting boards and salad bowls.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

View bondogaposis's profile

bondogaposis

2416 posts in 936 days


#3 posted 223 days ago

Without seeing a picture I can’t really say specifically, but generally these problems are caused by wood movement. The problem stems from the fact that wood does not move equally in all directions but rather differentially in the 3 planes of reference according to which position the board occupied in the tree from which it came. The 3 planes are radial, tangential and longitudinal. Problems most often occur when trying to confine pieces of wood in a frame. Wood movement in the longitudinal direction is so minute as to be negligible, therefore the inner pieces are shrinking and swelling with the ambient humidity but the frame is not changing in length, if the corners are mitered they will generally open over time.

-- Bondo Gaposis

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