Steve Demuth
03-13-2017, 7:41 PM
This falls into the category of "damn, was that dumb." I glued up some panels, 1/42" inch walnut veneer on one side and 1/42" backer veneer on the other of a solid 1/5" (corrected from 1/20") Red Oak core, using TiteBond III. They are 15" X 26" panels, veneer grain running the long direction, core grain the short. Normally I veneer over a composite substrate, but I was trying to make this piece using wood from the home place for one of the brood, and somehow managed to get all the way through making the cores and gluing them up before thinking about the consequences of wood movement. I blame age and the very good history book on tape (The Crusades: The Authoritative History of the War for the Holy Land, by Thomas Asbridge), read nicely to me by Alexa**.
Anyway, the oak in the core is very dry (originally kiln dried, now at 6% moisture (http://www.sawmillcreek.org/showthread.php?252885-Wood-(drying)-in-the-shop)), and I'm wondering what's going to happen if I use these panels. I can imagine 3/8" or more expansion in the direction of the veneer's long grain if the piece goes in an un-airconditioned house. Is that going to cause separation of core and veneer?
** I highly recommend the Amazon Echo / Alexa for the shop. I don't generally like talking to computers, but being able to start and stop your music or other audio with a simple voice command when you need to concentrate and/or are going to use a power tool is great.
Anyway, the oak in the core is very dry (originally kiln dried, now at 6% moisture (http://www.sawmillcreek.org/showthread.php?252885-Wood-(drying)-in-the-shop)), and I'm wondering what's going to happen if I use these panels. I can imagine 3/8" or more expansion in the direction of the veneer's long grain if the piece goes in an un-airconditioned house. Is that going to cause separation of core and veneer?
** I highly recommend the Amazon Echo / Alexa for the shop. I don't generally like talking to computers, but being able to start and stop your music or other audio with a simple voice command when you need to concentrate and/or are going to use a power tool is great.