Using and Applying Veneer (Junior Cert Wood Technology): Revision Notes

Veneering Techniques

Core Concepts

• Veneer: A thin layer of wood or similar material applied to improve looks or add strength to a base surface.
• Contact Adhesive: Suitable for materials that don't absorb liquids; bonds instantly when surfaces meet.
• P.V.A. (Polyvinyl Acetate) Adhesive: A water-based glue essential for woodworking because it is flexible.
• Grounding: The practice of levelling and cleaning a surface before adding veneer.
• Substrate: The base material, like MDF or chipboard, where veneers are applied. They are chosen for their smooth, even surfaces.

Step-by-step Instructions

Preparation

• Sand with fine-grit sandpaper to smooth the surface.
• Clean using a tack cloth to remove dust.
• Use a primer if needed to improve how well things stick.

Adhesive Application

• Choose based on needs: P.V.A. for flexibility, contact adhesive for quick use.
• Contact Adhesive: Apply with a spreader or spray. Let it get sticky; moving it later is tough.
• P.V.A. Adhesive: Use a brush, roller, or stick. Let it partly set before placing the veneer.

Benefits and Drawbacks of Adhesives

• Contact Adhesive:
  • Pro: Bonds instantly.
  • Con: Hard to adjust once bonded.
• P.V.A. Adhesive:
  • Pro: More adjusting time; dries clear.
  • Con: Requires longer curing time.

Explanation of the Veneering Process

• Grounding: Makes sure the surface is smooth and dust-free for the best bond.
• Application Techniques:
  • Hot Press Method: Uses heat for a strong bond.
  • Cold Press Method: Uses pressure, good for delicate veneers. Use clamps or weights for steady pressure.

Techniques for Fixing Veneers

• Edge Banding: Covers raw veneer edges.
• Pressing Methods: Use a hammer or smoothing blade to remove air and ensure a good bond during pressing. It gives even pressure.

Considerations for Backing Pieces

• Chipboard and MDF: Commonly used for being affordable and easy to find.
  • Preparation: Keep dry, seal edges to avoid swelling.
  • End-Use Considerations: Affects applications, like moisture and surface treatment.
  • Pros: Stable surface for veneer.
  • Cons: Can swell with moisture.

Summary