Cyanotype Setup for Beginners

The Sun Does the Developing

Brush two mixed liquids onto a sheet of paper, lay a fern on it, and leave it in the sun. Ten minutes later you rinse it under the tap and watch a white silhouette surface out of deep Prussian blue. That's cyanotype — the 1842 invention of astronomer Sir John Herschel, and a good place to start if you're still working out what cyanotype actually is. A year on, botanist Anna Atkins used it to make the first book ever illustrated with photographs, pressing seaweed onto coated pages. Engineers then ran the same chemistry for a century to copy their plans — it's why we still call a plan a blueprint.

One decision shapes this whole shopping list: sun or lamp. Start with the sun. It costs nothing, and a weak sky just means a longer exposure, not a failed one — people print through northern winters this way. Buy a UV lamp only once grey weeks actually block you, or when you want exposures you can repeat to the minute; the full sunlight versus UV lamp comparison digs into that call. Everything below assumes daylight and a kitchen table.

Our philosophy here is stubbornly minimal: the chemistry, one pack of the right paper, a foam brush and a pane of glass are a complete working setup. Nothing else on this page is required for a first print.

The picks below were chosen so that finding out this isn't your hobby stays a cheap discovery — the one splurge is the paper, and there's a reason for it.

Two Bottles, a Brush, a Pane of Glass

The chemistry itself is the easy part: fill both bottles with water, wait a day, then mix a few millilitres of A and B right before you coat. Mixed sensitizer dies in hours, but the stock bottles keep for months and outlast most people's first year. The real trap is paper. Most watercolour pads are buffered with chalk to protect drawings from acid, and that same alkaline buffer quietly kills this process — prints come out pale, or wash clean off. What you want is unbuffered paper in the 200–300 gsm watercolour range, sturdy enough to soak. It's the least glamorous line on this list and the one that decides everything.

If the total here stings, a leaner path exists — there's a workable cyanotype setup for under 40 euros — but these four are the version nobody regrets.

When the Weather Stops Cooperating

Nothing in this section is needed for a first print — which is exactly why it's the section beginners overspend on first. The honest order is: make prints in the sun for a few weekends, notice what actually annoys you, then fix that one thing. For most people the annoyance is weather, and the fix is a UV panel that turns exposure into a number you can repeat in January. For others it's the ceiling on subject matter, and the fix is transparency film: once a phone photo can become a negative, portraits and street shots join the ferns. The gloves you'll simply be glad of the first time you see what the solution does to fingertips.

Printing the Sun onto Fabric

Sooner or later everyone wants the blue on something wearable, and fabric is genuinely a second skill rather than a bigger sheet of paper. Cloth needs longer exposures than paper and drinks more chemistry, and only natural fibres hold the image — on a polyester blend the print rinses away with the wash water. The painless entry is pre-sensitized cotton sheets: exposure and rinsing work exactly as they did on paper, with the coating already done for you. When those feel easy, the bottle chemistry plus cheap all-cotton cloth opens up totes, tea towels and quilt squares for pennies per attempt.

Low-Drama Chemistry, Two Real Rules

You'll read everywhere that cyanotype is non-toxic. That's folklore, and it's worth replacing with the two facts that matter. Potassium ferricyanide, despite the alarming name, is genuinely low-hazard on its own — safety sheets rate it a 1 out of 4, in the same lethal-dose neighbourhood as table salt — because its cyanide groups are locked to iron. The lock opens two ways: strong acid, or high heat. Meet either and it can release hydrogen cyanide gas. So rule one: concentrated chemistry never meets strong acids or a stove. The dilute citric rinse on a washed print is normal practice; pouring acid into your stock bottles, or warming solution to dissolve it faster, is how the one real hazard in this hobby gets invited in.

Rule two is the drain. Leftover sensitizer and the first strong rinse aren't drain-safe — collect them in a jug and hand it to household hazardous-waste collection instead of the sink. Beyond that, the habits are ordinary: nitrile gloves on for mixing and coating, no kitchen utensils on chemistry duty ever again once borrowed, bottles labelled and shelved away from kids.

Why First Prints Die (and How Yours Won't)

Why did my image wash straight off in the rinse?

Nine times out of ten this is underexposure: the iron never fully converted, so the water carried it away. Beginners pull prints early because the exposed coating looks oddly grey and 'wrong' — but that dull bronze-grey is precisely what done looks like. Wait for it. The other classic causes are printing on the wrong side of pre-coated paper and printing on synthetic fabric, so mark the coated face while it's still in dim light.

Why is my print pale sky-blue instead of deep navy?

Suspect the paper first. Buffered watercolour paper — which is most watercolour paper — carries an alkaline chalk reserve that attacks the chemistry before light ever gets a vote. Switch to an unbuffered sheet, or soak the buffered one in a dilute citric-acid bath and dry it before coating. If the paper is right, mix fresh sensitizer: the combined solution is only good for a few hours, and a batch mixed yesterday prints weak.

Why does the print look blotchy where nothing was even sitting?

Blotches are almost always laid down at the coating stage and only revealed by the exposure. Coating in a bright room part-exposes the sheet before you ever reach the sun; puddles and dry gaps print as clouds. Coat in dim light with an almost-dry brush, working slow passes vertically and then horizontally, and let the sheet dry flat in the dark rather than propped by a window.

My whites were white, then turned yellowish overnight — what happened?

Unreacted chemistry stayed in the fibres and kept working after you stopped. A rinse that looks sufficient often isn't: five minutes minimum, changing the water until it runs truly clear, and hold the wet print up to the light — any lemon tint still in the paper is tomorrow's stain. Prints also mustn't dry face-down on paper towels, which wick the blue out along with the water.