Has anyone had any problems with glue joints using titebond and finishing with tung oil.
Over time the joint seems to swell up over the glueline. I dried some glue and then soaked it in tung oil. It gained weight and became translucent. Indicating the glue absorbed the oil. the ridge that formed on the gluedup and finished boards was a fine small ridge. Others here think it is a moisture problem but it is not the typical dimple after drying but a ridge. Just curious if anyone else has come across this.
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Bet you are using yellow or white PVA. PVA adhesive is known for having the problem you describe. Here is a treatise in response to the same issue that was put together years ago.
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Creep has been known about for many years, perhaps even centuries. It's nothing new and has already been defined precisely, so no need to reinvent the wheel here. PVA is the classic and renowned creeper.
The tendency of the glue to ooze out of joints is one form of creep. A classic example is in a slab edge to edge glueup, such as a table top. When ambient humidity rises the timber and the the glue swell. When the ambient humidity goes down the timber shrinks again, and so does the glue, but the glue doesn't all shrink back into its original place resulting in a line of pimples disfiguring the finish. Actually, under sustained high humidity my anecdotal observations are that the glue keeps on absorbing moisture and creeps out of the joint without the need for the timber to shrink. The symptoms can also be seen sometimes at the shoulder line of other joints such as mortise and tenons. Slainte, RJ
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Personally, I have not used PVA for panel glue ups for a number of years. My adhesive of choice for that operation is urea formaldehyde (Plastic Resin).
Ha, ha, Howie. Funny to see my own words quoted right back at me.
But, yep. It's creep. Time for bed. Slainte.RJFurniture
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