Tips To Know For Vacuum Veneering
No matter how many times you've used a vacuum
press for burl wood veneer, there's
always a moment of slight anxiety when you pull a veneered panel out of the
press. You're wondering if there will be bubbles, ripples, delamination, or
seam separation. Here are a few tips to ease the worry and avoid the most
common mistakes when working with veneer.
1.
Choose the right glue
Contact cement is only suitable for paper backed
and 2 ply veneers. It's a common beginner mistake to use contact cement or
yellow wood glue on raw wood veneers. Neither of these adhesives dries hard and
yellow glue has a tendency to bleed-through. Contact cement is
only suitable for paper backed and 2
ply veneers. Wood veneer with no backing should never be used with contact
cement.
2.
Use a glue roller
Always apply glue to the substrate material and
not to the veneer. The easiest way to apply most water-based veneer adhesives
on melamine edge banding is with
a simple foam
rubber glue roller. These rollers are re-usable and
inexpensive.
The key is to apply veneer glue evenly and the
rule of thumb is that the surface of the substrate should look evenly painted
with veneer glue. It should not be dripping wet. A good test is to place a
pencil mark on the substrate and apply the glue. If you can easily see the
pencil mark on the substrate through the wet adhesive, you likely have the
right amount of glue.
3.
Allow the panel to
dry properly
Don't leave the veneered panel in the press
longer than the glue specifies because some veneer adhesives can get
"globby" which then causes ripples and bubbles to form in the veneer.
Additionally, panels left in the press for too long can develop patches of
mold.
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