The Photogram — The Blue That Resists Time

Two centuries after Anna Atkins placed fern to paper and invented the photobook, the cyanotype’s luminous Prussian blue still poses an uncomfortable question—have we traded permanence for convenience?

I first held a cyanotype print in the reading room of the Royal Society, twenty-three years into a career spent mostly staring at screens. The sheet measured roughly eleven by fourteen inches—a modest rectangle of Prussian blue—and on its surface, in ghost-white silhouette, lay a single frond of Dictyota dichotoma. Anna Atkins had placed it there in 1843, left it in sunlight for perhaps twenty minutes, and fixed the image with plain water. The resulting photogram, now approaching its two-hundredth year, showed no sign of fading.

The permanence problem

Digital archives rot in decades. Magnetic media, optical discs, cloud storage—each generation promises durability and delivers obsolescence. Meanwhile, Atkins’s ferns, algae, and feathers sit in museum drawers, chemically stable and legible to any human eye that cares to look.