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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