Book Edge Sanding Before Foil Decoration

This video shows the edge preparation step before a decorative foil finish is applied to a book block. The edges are sanded smooth so the final decoration has a cleaner, more even surface.

Key moments

What this video shows

The book block is held firmly while the exposed page edge is sanded. This step removes small rough spots left from trimming and helps make the page edge more uniform.

This preparation is important when the edge will receive foil, gilding, or another decorative edge treatment. If the paper edge is uneven, the decoration can look broken, patchy, or less clean after production.

Why does the edge need to be sanded before foil decoration?

Foil needs a flat, stable surface. A book edge may look smooth after trimming, but under pressure and foil transfer, small paper fibers and uneven spots can show.

Sanding helps level the edge so the foil can make better contact across the book block. The goal is not to reshape the book. The goal is to prepare the edge so the finish looks intentional and consistent.

How many times does the book edge need to be sanded before edge printing?

Usually, the book edge is sanded 2 to 4 times before edge printing. The first round may use a rougher grit, such as 120 grit, to level the edge and remove cutting marks. The next round may use 150 grit to smooth the paper fibers. The final round may use 240 grit or finer to prepare the edge for printing.

The exact sanding process depends on the paper type and the edge condition. Coated paper usually has a smoother, tighter surface, so it may not need as much fine sanding. Uncoated paper, thicker paper, or softer absorbent paper can have more loose fibers and rough spots on the edge, so an extra fine sanding round, such as 320 grit, may be needed. The goal is to make the edge flat, smooth, and clean, so the finish can apply evenly and securely.

Is edge sanding the same as trimming?

No. Trimming cuts the book block to final size. Sanding is a finishing-prep step after trimming.

Trimming sets the size and creates the edge. Sanding refines that edge before decoration. For plain books, sanding may not be needed. For foil edge work, metallic gilding, or premium edge decoration, the extra preparation can make a noticeable difference.

What happens after sanding?

After sanding, the edge can move to the decoration step. For foil edge decoration, the book block is usually clamped tightly, foil is positioned over the edge, and heat plus pressure are used to transfer the foil onto the paper edge.

You can see that next step in the book edge gilding video.