Create a Sun‑Printed Cyanotype Wall Hanging in 5 Easy Steps

There’s something magical about letting the sun do the work. In a world where everything is digital, a piece of fabric that has been turned blue by sunlight feels like a quiet rebellion – and it’s easier than you think. Whether you’re looking to add a touch of sky to your living room or want a simple project for a rainy weekend, this guide will walk you through a sun‑printed cyanotype wall hanging in five straightforward steps.

Gather Your Materials

Before the sun can start its painting, you need a small kit. Here’s what I keep on my workbench:

• Cotton or linen fabric, 12‑inch square or larger
• Cyanotype chemicals (Ferric ammonium citrate and potassium ferricyanide)
• Two shallow trays or glass dishes for mixing
• A brush or foam roller
• A piece of glass or acrylic sheet (the size of your fabric)
• A sunny spot or a UV lamp for indoor work
• Protective gloves and goggles (the chemicals are harmless once dry, but it’s nice to stay safe)

I bought my first set at a local art supply store and have never looked back. The chemicals are cheap, and the results are priceless.

Step 1 – Prepare the Sensitized Solution

Mix equal parts of the two chemicals in a dimly lit room (a kitchen under a low‑watt lamp works fine). Stir gently until the powder disappears. The solution will look pale green; that’s normal. Pour the mixture into a clean tray.

Tip: Label the tray with a marker so you don’t mix it up with water later. I once poured the solution into a water glass by mistake – the result was a very faint blue that looked more like a watercolor wash than a cyanotype.

Step 2 – Coat the Fabric

Lay your fabric flat on a clean surface. Using a brush or foam roller, apply the sensitized solution evenly. Work quickly; the coating will start to dry in the light. Make sure both sides get a thin, uniform layer – you don’t need a thick coat, just enough to wet the fibers.

Personal note: I love the smell of the fresh‑mixed solution. It reminds me of a rainy day in a library, a mix of metal and earth. Let the fabric dry in a dark room for about 10‑15 minutes. If you’re impatient, a quick flip of a light switch can speed things up, but keep the light low.

Step 3 – Arrange Your Design

Now the fun part: placing objects on the fabric. Anything that blocks light will stay white, while exposed areas turn a deep Prussian blue. Common choices are leaves, lace, stencils, or even handwritten text with a permanent marker. I once used a vintage map as a mask – the result looked like a blue‑toned treasure map on my wall.

Place the coated side up on a piece of glass. Arrange your objects on top, then cover with another sheet of glass to keep everything flat. Secure the sandwich with clips or rubber bands.

Step 4 – Let the Sun Do Its Work

Take your glass‑sandwiched fabric outside on a sunny day. Position it where it will get direct sunlight for 5‑10 minutes, depending on the intensity of the sun. The exposure time can be a bit of a guessing game; a bright midday sun will need less time than a soft morning light.

Quick test: After a few minutes, lift the top glass and peek at the edges. If you see a faint blue starting to appear, you’re on the right track. If the whole piece stays pale, give it a few more minutes. I’ve learned to trust my gut – the sun tells you when it’s done.

Step 5 – Rinse, Dry, and Hang

When the blue has deepened to your liking, rinse the fabric in cool running water. The unexposed areas will wash away, leaving crisp white shapes against the blue background. Keep rinsing until the water runs clear – this removes any leftover chemicals.

Lay the fabric flat on a clean towel and let it air dry. Once dry, you have a ready‑to‑hang piece. I like to stretch it over a simple wooden dowel and tie a piece of twine at each end. It adds a rustic touch and makes it easy to hang on a nail or hook.

Final thought: The whole process takes less than an hour, but the feeling of holding a sun‑made artwork is timeless. Each wall hanging is unique – no two pieces will ever look the same, because the sun never repeats its path exactly.

Enjoy the simple pleasure of turning light into art. The next time you hear the forecast call for sunshine, remember you have a creative excuse to step outside, coat some fabric, and watch the sky paint your walls.