Don Stephan
Posts: 825
Joined: 2003-07-18
Location: Cincinnati, Ohio
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Carving friend down the street asked if vacuum bag could be used with yellow PVA adhesive to glue up blanks for carved newel posts. He's using cherry boards 8" x 1.75" x 60". Normal pipe and bar clamps don't reach the middle and too few heavy duty deep throat clamps. If I used a vacuum bag, my first thought would be to position the boards on edge, so that the glue joints are vertical. If I placed a melamine caul 8" x 60" underneath, the bag could drape down the sides completely and the boards couldn't slip from side to side, only in the long dimension. If I position the boards so that the glue joints are horizontal, the boards could slip in two directions as the bag is evacuated, but the size of the melamine caul would be less critical. Is one orientation better than the other? Thanks.
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