To keep a poster from sliding within its frame, the most effective method is to properly secure the backing board using framing hardware like springs or clips.
Keeping your cherished posters flat and centered in their frames ensures they look their best and remain protected. While gravity and movement can cause them to shift, using the right techniques and materials will hold them firmly in place.
Utilizing Framing Hardware
As highlighted in framing practices, a primary solution involves using specific hardware designed for picture frames.
- Use framing hardware, such as springs or clips, to secure the backing board to the frame. This pressure applied by the hardware against the backing board keeps everything inside, including the poster, pressed against the front (the glass or acrylic). This constant pressure minimizes movement.
- As you assemble the frame, be careful not to damage the poster. Ensure the hardware is positioned correctly to apply even pressure without pressing directly on the poster itself.
Different types of framing hardware include:
- Flexi-points or Brads: Small metal tabs or nails that are bent down into the frame rabbet (the groove where the contents sit) to hold the backing in place.
- Spring Clips: These are often used in metal frames. They are inserted between the backing board and the frame's edge, providing spring tension that pushes the contents forward against the glass.
- Flat Springs: Similar to spring clips, but often used in wooden frames, providing gentle, consistent pressure.
Additional Techniques for Stability
Beyond hardware, several other techniques can help prevent a poster from shifting:
- Use Acid-Free Tape (Carefully!): Apply a small piece of acid-free, archival-quality tape (like linen tape or paper tape specifically for framing) to the back of the poster's top edge and attach it to the backing board or a mat board. Only tape the top edge to allow the poster to expand and contract slightly with humidity changes without buckling. Avoid standard tapes like Scotch tape, which can damage the poster over time.
- Incorporate a Mat Board: A properly sized mat board not only enhances the appearance but also helps hold the poster flat and centered. The poster can be hinged to the mat board using archival tape. The mat board then sits within the frame, providing an extra layer of stability.
- Ensure a Snug Fit: Make sure the poster, mat (if used), and backing board combination is the correct thickness for the frame's rabbet. A loose fit allows more room for movement. You can add a piece of foam board or acid-free cardboard behind the backing board if necessary to fill space, but ensure the hardware can still secure everything properly.
- Use a Rigid Backing Board: A thin, flimsy backing board won't provide adequate support. Use a sturdy material like foam board or conservation-grade cardboard that resists bending and keeps the poster flat.
Comparing Stability Methods
| Method | Primary Function | How it Prevents Sliding | Best Used With | Notes |
|---|---|---|---|---|
| Framing Hardware | Securing Backing Board | Applies pressure keeping contents against glass | Most Frame Types | Essential for a secure assembly. |
| Acid-Free Tape (Hinging) | Attaching Poster to Backing/Mat | Holds poster position relative to backing/mat | Posters, Prints | Use sparingly, top edge only. |
| Mat Board | Enhancing Presentation, Providing Space | Adds structure, can be hinged to | Posters, Photos, Art | Also protects from contact with glass. |
| Rigid Backing Board | Supporting Contents | Keeps poster flat and fills frame space | All Framed Items | Prevents bowing and shifting. |
| Ensuring Snug Fit | Filling Frame Space | Reduces void space for movement | All Framed Items | Critical for overall stability. |
By combining the use of proper framing hardware to secure the backing board with techniques like archival hinging and using a rigid backing, you can effectively prevent your poster from sliding within the frame and ensure its longevity. Remember to handle your poster with clean hands and care during the framing process.
