Est. 1998 — 27 years of woodworking knowledge
gluing question
George in Lowell, Mich.
>While talking with a guy at work, a non woodworker,he said that when he was in high school his teacher told him to always put a piece of paper in each glue joint. What's the reason??? Seems like it would tend to be a place for the joint to seperate. He was glueing up a block to make a bowl on a lathe when told to do it. The teacher said it would make the joint stronger?????
George in cold (10*) Lowell, Mich.
The only time of heard of this...
Scott Burr in Ben Lomond CA
>Is so you can take the joint apart. I can't see it making a wood joint stronger.
When to be wary
bill tindal, E.TN
>This is a good example to be wary of the memory of persons that don't do what they are telling you about. A piece of paper can be used between a wooden face plate and bowl so that it can be easily separated after turning, but this technique is seldom used now days. Instead cyanoacrylate glue is used on a sacrificial wood face plate.
Perhaps
Jim Reed @ Tallahassee
>the story lost something in translation. It depends on what a *piece of paper* means. If the paper is thick like butcher paper, it will allow the joint to separate as has been commented on. This is an effective technique for split carvings and such and is well documented in the literature. If however the paper is thin tissue paper, then it will serve another purpose. Thin paper will retain watery glue and probably make it perform better. If the wood to wood contact is not good, the paper will serve as a gasket and make the fit better. I have heard of old timers using sprinkles of sand in glue to keep parts from moving under clamping pressure. I think the effectiveness is in how much sand and where it is placed. Probably works well with a tiny amount of very fine sand and probably fails miserably with gobs of coarse river sand. Bottom line is that it is impossible to know what your friend was talking about, but that kind of water cooler chat beats talk of Anna Nichole or Paris Hilton any day.
Re: The only good thing about ....
George in Lowell, Mich.
>talking about Anna or Paris is your jaw muscles get some excercise.
My friend said that "notebook" paper went between each block of wood to insure the "strongest glue joint possible". He didn't remember why but his teacher was manic about this procedure.
The few (as in 3-4 per square inch) grains of sand idea sounds like something to try! I just glued up the portable vise that Todd came up with and the blocks slid all over.
Work safe,
George in real warm (25*) Lowell, Mich.
Re: The only good thing about ....
ThomD
>Grains of sand works tiny copper brads clipped off work better. With some sand it just break up and you end up with mud in the joint. but a couple of sharp pieces in there will eliminate slip, it just takes a few pieces. I would hardly ever bother with this, I jusy got interested in the subject when people were jamming biscuits in every joint to stop them skidding around. There are lots of ways of minimizing the slip.