Cardboard Wall Art: Layered Relief Panels from Box Scraps

Cardboard wall art sounds like a school project until you see what layering does to it. Stack a few simple shapes cut from a shipping box, let some of the ribbed inner layer show, and paint the whole thing in three colors: the result reads as a relief panel, with real shadows between the layers.

This project makes one abstract panel of arches, circles and a leaf. Nothing in it needs drawing skill. What it does need is tidy cutting and a little planning before the glue comes out.

What you need

• Corrugated cardboard from one medium shipping box, clean, dry and free of grease
• A backing rectangle, about 12 x 16 in (30 x 40 cm), cut from the flattest part of the box
• Craft knife, cutting mat and metal ruler, plus scissors for small trims
• Pencil, plain paper and a few round objects to trace (a bowl, a mug, a jar lid)
• White (PVA) glue or tacky glue, and a few heavy books
• Acrylic craft paint in two colors, and a flat brush
• Twine or ribbon and strong tape for the hanging loop

Single-wall cardboard, the ordinary kind with one wavy layer, is the right choice. Double-wall board is hard to cut into curves and too thick to stack three deep.

Plan the composition on paper first

Draw the backing rectangle at a small scale on plain paper and sketch a few arrangements. Layered panels look best with a small cast: here that means three arches of decreasing size, two circles and one leaf.

A few guidelines keep an abstract layout from looking random:

• Let shapes overlap. Relief only shows where one piece sits on another.
• Nest the three arches inside one another so they form a rainbow-like stack. That stack is the focal point.
• Place the larger circle partly behind the arches and the smaller one off to a side.
• Leave some of the backing empty. Blank space makes the layers stand out.
• Keep every shape at least 1/2 in (1.3 cm) inside the edge of the backing.

Cut the backing and the shapes

Cut the backing rectangle first, with the knife against the metal ruler. Then draw the shapes on the remaining cardboard. Trace a bowl for the largest arch and smaller round objects for the inner ones, and make each arch band about 1 in (2.5 cm) wide. Draw the leaf freehand as a pointed oval.

Curves are the tricky part. Cut them with the knife in several light passes, turning the cardboard rather than your wrist, and tidy any fuzzy edges with scissors. The guide on how to cut cardboard cleanly covers curves, blade changes and corrugation direction in more detail.

Lay the cut pieces beside the backing in the order you plan to glue them, and compare them with your sketch. This is the moment to recut a shape that turned out too big.

Peel some pieces to show the ribs

The ribbed texture is what makes the panel look like more than flat card. Corrugated cardboard is a wavy sheet glued between two flat liners, and one liner can be peeled away.

1. Choose one or two pieces to texture. A circle and the middle arch are good candidates.
2. Lift a corner of the top paper with a fingernail or the knife tip.
3. Peel slowly, in the direction the ribs run. Short pulls work better than one long one.
4. Where paper stays stuck, dampen it lightly with a barely wet sponge, wait a minute and rub it off with a fingertip.
5. Let the piece dry flat before painting.

Paint in a limited palette

Two paint colors plus the natural brown of the cardboard are enough. Terracotta and mustard sit well beside bare card; so do white and a single deep blue. More colors than that tend to hide the relief instead of showing it.

Paint the pieces before gluing, so the edges are covered and the backing stays clean. Use thin coats and let each one dry for about 20 to 30 minutes. Heavy, wet paint can make cardboard curl; if a piece does bow, paint the back as well and dry it under a book once it is no longer tacky.

On ribbed pieces, drag an almost dry brush across the ridges so the color catches the tops and the grooves stay darker. Leave at least one shape unpainted.

Glue the layers

1. Decide whether to paint the backing or leave it brown, and let it dry.
2. Glue the bottom layer first: the largest arch and the larger circle. Spread glue thinly and keep it back from the edges so none squeezes out.
3. Add the second layer, the middle arch and the leaf, overlapping the first pieces.
4. Finish with the smallest arch and the small circle on top.
5. Cover the panel with a sheet of paper, weigh it down with books, and leave it for about an hour. Avoid pressing hard on ribbed pieces, which flatten easily.

Add a hanging loop and put it up

Cut about 6 in (15 cm) of twine, fold it into a loop, and fix the ends to the back of the panel near the top center with glue and a strip of strong tape. Glue a small cardboard square over the ends to lock them in.

The finished panel is very light, so it can hang from a small nail by its loop. If you prefer not to make a hole, removable adhesive strips on the back corners work too; follow the weight guidance on their packaging. Keep the panel out of bathrooms and other damp spots, since moisture softens cardboard.

Variations and what to make next

Three small panels in the same palette make a stronger display than one large one. You can also swap the arches for overlapping leaves, or cut a panel of plain stacked squares.

The same box yields a sturdy cardboard picture frame to hang beside the panel. For a lighter, lacier look, paper tube flower panels use sliced tubes instead of flat shapes.