An inline adaptation of a distinctive slab serif, Cesium is an unusually responsive display face that maintains its high energy across a range of different moods. The Cesium typeface was designed by Jonathan Hoefler in 2020. An energetic inline adaptation of Hoefler’s broad-shouldered Vitesse Black typeface (2000), Cesium is named for the fifty-fifth member of the periodic table of the elements, a volatile liquid metal that presents as a scintillating quicksilver. From the desk of the designer, Jonathan Hoefler: I always felt that our Vitesse typeface, an unusual species of slab serif, would take well to an inline. Vitesse is based not on the circle or the ellipse, but on a less familiar shape that has no common name, a variation on the ‘stadium’ that has two opposing flat edges, and two gently rounded sides. In place of sharp corners, Vitesse uses a continuously flowing stroke to manage the transition between upright and diagonal lines, most apparent on letters like M and N. A year of making this gesture with my wrist, both when drawing letterforms and miming their intentions during design critiques, left me thinking about a reduced version of the typeface, in which letters would be defined not by inside and outside contours, but by a single, fluid raceway. Like most straightforward ideas, this one proved challenging to execute, but its puzzles were immensely satisfying to solve. Adding an inline to a typeface is the quickest way to reveal its secrets. All the furtive adjustments in weight and size that a type designer makes — relieving congestion by thinning the center arm of a bold E, or lightening the intersecting strokes of a W — are instantly exposed with the addition of a centerline. Adapting an existing alphabet to accommodate this inline called for renovating every single character (down to the capital I, the period, and even the space), in some cases making small adjustments to reallocate weight, at other times redesigning whole parts of the character set. The longer we worked on the typeface, the more we discovered opportunities to turn these constraints into advantages, solving stubbornly complex characters like € and § by redefining how an inline should behave, and using these new patterns to reshape the rest of the alphabet. The New Typeface The outcome is a typeface we’re calling Cesium. It shares many of Vitesse’s qualities, its heartbeat an energetic thrum of motorsports and industry, and it will doubtless be welcome in both hardware stores and Hollywood. But we’ve been surprised by Cesium’s more reflective moods, its ability to be alert and softspoken at the same time. Much in the way that vibrant colors can animate a typeface, we’ve found that Cesium’s sensitivity to spacing most effectively changes its voice. Tighter leading and tracking turns up the heat, heightening Cesium’s sporty, high-tech associations, but with the addition of letterspacing it achieves an almost literary repose. This range of voices recommends Cesium not only to logos, book covers, and title sequences, but to projects that regularly must adjust their volume, such as identities, packaging, and editorial design. Read more about how to use Cesium. About the Name Cesium is a chemical element, one of only five metals that’s liquid at room temperature. Resembling quicksilver, cesium is typically stored in a glass ampule, where the tension between a sturdy outer vessel and its volatile contents is scintillating. The Cesium typeface hopes to capture this quality, its bright and insistent inline restrained by a strong and sinuous container. Cesium is one of only three H&Co typefaces whose name comes from the periodic table, a distinction it shares with Mercury and Tungsten. At a time when I considered a more sci-fi name for the typeface, I learned that these three elements have an unusual connection: they’re used together in the propulsion system of nasa’s Deep Space 1, the first interplanetary spacecraft powered by an ion drive. I found the association compelling, and adopted the name at once, with the hope that designers might employ the typeface in the same spirit of discovery, optimism, and invention. —JH Featured in: Best Fonts for Logos