Joseon Galmo — The Rainy-Day Cone That Became a Lamp

On rainy days, Joseon people reached not for an umbrella but for this: a folding cone called a galmo, worn right over the gat, the horsehair hat. Folded, it collapses flat like a fan; opened, it becomes a perfect cone — Joseon-style rain gear. When I first met this one at an antique shop, I confess my first thought was not rain but lighting.

The construction is simple and clever: fine bamboo ribs fanned around oiled hanji paper, made to fold and unfold. When rain came, it kept the gat dry; when skies cleared, it folded away into a sleeve or a pack. That a rain cover of paper and bamboo has survived a century to stand before me is, the more I think about it, quietly astonishing.

Westerners visiting Korea in the late 19th century called it “a land of hats” — every status, age and trade had its own. A 2019 New York exhibition was titled exactly that, “Korea: A Land of Hats,” and the galmo was, so to speak, the official rain gear of that kingdom of hats. A hat to protect a hat — you can feel the sincerity.

So how do we use this cone today? Our favorite answer is light. Oiled hanji glows softly when it holds light, so perched over a low mood lamp, the galmo becomes a warm cone floating in the room. In our atelier this one lives its second life not as rain gear but as a lampshade. (Just avoid hot bulbs — this creature is paper.)

Even without a lamp, the galmo is a perfect cone — a geometric objet scored with the rhythm of a folding fan. Try setting just one on a cold piece of modern furniture: a USM modular unit or a stainless-steel shelf. The moment a hundred-year-old paper cone lands on smooth metal, you get the easiest possible frame where “hip” and “antique” share one picture. The more minimal the room, the stronger it works.

Galmo in Museums and Exhibitions

You can meet galmo in museum storerooms and exhibitions, too. Here are the Gimhae Folk Museum’s example (via e-Museum), a plate from the New York exhibition, and a record from the Traditional Culture Portal — open and worn, side by side.

Reference images: e-Museum, National Museum of Korea (emuseum.go.kr) · “Korea: A Land of Hats”, Korean Cultural Center New York (koreanculture.org) · Traditional Culture Portal (kculture.or.kr, KOGL attribution). Click an image to open the source page.

The object that once kept a hat dry in the rain now keeps the light in a dry room. On the next rainy day, we’ll have a soft lamp glowing under the galmo at our atelier, waiting. :-)