What Is Claybord, and Why I Draw On It

DOUBLE PARKED, 16"x20", graphite and carbon on Claybord. Two horses waiting their turn at a branding
What Is Claybord, and Why I Draw On It
If you've followed my work for a while, you may have noticed that my older drawings are on watercolor paper, while most of my newer work is on something called Claybord. I get asked about this often: what Claybord actually is, why I switched, and how it's different from paper. So here's the full explanation.
What Claybord Actually Is
Claybord is an art panel made by Ampersand Art Supply, Inc., based in Buda, Texas. The panels are 1/8-inch thick hardboard, coated on one side with clay to create a very smooth, very white surface for drawing or painting.
Hardboard, commonly known as Masonite, is an engineered wood made from steam-cooked, pressure-molded wood fibers. Ampersand makes theirs from US-grown, low-pH aspen fibers, and seals the panels using their own process to keep them acid-free.
The drawing surface itself is a layer of kaolin clay, about 7 to 10 mils thick, applied to the panel and sanded smooth. Kaolin, also called china clay, is the same soft white clay used to make porcelain. It's named after the hill in China, Kao-ling, where it was first mined. That fine, sanded clay surface is what allows for very crisp, very fine detail.
Ampersand's process results in a rigid, archival-quality surface that won't warp or discolor over time, and panels are available in sizes up to 48 by 72 inches.
Where It Came From
Claybord wasn't invented in a lab by a materials company. It came from an artist trying to solve his own problem.
Charles Ewing, born in Albuquerque and now living in southwestern Colorado, enjoyed scratchboard drawing, but didn't like the scratchboard surfaces available at the time, which were mostly clay-coated cardboard, not very rigid or durable. His technique involves applying layers of India ink washes, getting gradually darker, then scratching or abrading the surface to remove ink and expose the white clay underneath, producing highlights that range from sharp to broad.
Since nothing on the market worked the way he wanted, Ewing made his own clay-coated panels and used them privately for about ten years before beginning to sell a limited supply to other artists. In the early 1990s, he was approached by Elaine Salazar, then a graduate student at the University of Texas McCombs School of Business. She and three classmates built a business plan around the product and won a national business contest with it, which led to the founding of Ampersand Art Supply in 1993, together with Charles and Barbara Ewing. Salazar still serves as the company's CEO today.
Claybord was Ampersand's first product, but the company now makes eleven different surfaces for various media, including Scratchbord, a version of Claybord with a black India ink coating already applied. They also produce inks, tools, and frames designed specifically for their panels.
How I Use It
My technique borrows directly from Ewing's approach: I build up graphite in layers, then scratch, abrade, or erase back into it to reveal the white clay surface underneath. Beyond that, my actual drawing process on Claybord is similar to how I've always worked on paper. I apply graphite with pencils, as well as with cotton swabs, makeup brushes, sponges, and applicators.
The real difference between the two surfaces shows up in two places.
First, Claybord's very hard, very smooth surface lets me get crisp, clean lines when marking with a pencil. Paper has more texture, and that texture tends to soften a line slightly, which can leave a subject looking a little fuzzy up close, not ideal when I want sharp edges or fine detail. Second, abrasion from blending and erasing can rough up or damage paper over time, while the clay surface on Claybord is far more durable and is actually designed to handle that kind of abrasive technique.
Like Ewing, I rely heavily on Claybord's ability to take an etched line. Because the clay surface is bright white, scratching through the darker graphite layers reveals very pronounced, very crisp highlights, the kind I could never reliably get on paper. Paper absorbs graphite deep into its fibers and never quite returns to a true white once that graphite goes down. Claybord accepts graphite well without absorbing it as deeply, so it can be removed back to a clean white surface, and the hard panel allows for sharply etched lines that paper's fibers simply can't hold.
Why It Matters for Collectors
Beyond how it changes my drawing technique, Claybord solves a real, practical problem with works on paper: longevity and display.
Paper is delicate. To protect it long-term, it needs to be sealed into a well-built framing system: mat board, acid-free materials, and glass on top, all working together to keep contaminants and light away from the surface. That's a real cost, in materials, in fragility, and in weight, especially as a piece gets larger.
The drawing surface on Claybord can be varnished and displayed without glass at all, the same way an oil or acrylic painting on canvas is finished and displayed. Varnish does require occasional long-term maintenance, much like the varnish on any painting, but it removes the need for a sealed glass system entirely. Some of my newer pieces use cradled Claybord panels, reinforced along the edges with birch plywood, which can be framed traditionally, floated in a frame, or hung with no frame at all for a more contemporary look.
While a Claybord panel costs more upfront than a comparable sheet of paper, the savings on framing, no glass, often simpler molding, usually brings the total finished cost down, especially as the size of the piece increases.
Claybord in Practice
A good example of how this comes together is a pair of drawings I made for the Colorado Governor's Art Show: DOUBLE PARKED and LEAVING SUMMER PASTURE, both 16 by 20 inches, graphite on Ampersand Claybord panels.
Both pieces were drawn on varnished Claybord and framed without glass, with the panel's edges stained and finished so the piece could be displayed in a frame or hung frameless for a more contemporary look, the same flexibility I mentioned above. The crisp highlights Claybord allows for, the wispy clouds and built-up storm light in DOUBLE PARKED, the sunlit haze and dust in LEAVING SUMMER PASTURE, are both places where that etching technique did real work. Those bright, sharp highlights against the darker graphite are part of what gives those drawings their depth, and they're the kind of detail that's much harder to pull off convincingly on paper.
That's the short version of what Claybord is and why I've made it my primary surface. In a future post, I'll get into more of the specific tools and techniques I use once I'm actually working on the panel.





