Why Surface Decoration Matters
Form gets you 80% there. Decoration gets the last 20% — and it's the part people remember. A carved mug has a story in the hand. A sgraffito bowl draws the eye every time it's used. Decoration is where your pottery stops looking like everyone else's and starts looking like yours.
Stephen Jepson's decades of work at the University of Central Florida produced pieces celebrated for their surface treatment as much as their form. His video lessons walk you through each technique with the patience and detail that only comes from 50+ years of practice.
Surface Decoration Techniques
Stamping
Press textured objects into leather-hard clay: buttons, shells, lace, hand-carved clay stamps, or found objects. Quick, repeatable, and requires zero drawing skill. Create borders, all-over patterns, or focal accents. Make your own stamps from bisque-fired clay for unique marks.
Underglaze Painting
Paint directly on bisqueware with commercial underglazes — they work like watercolors or acrylics on a ceramic surface. Layer colors, blend, add fine detail with small brushes. Fire to bisque, then cover with a clear glaze for a glossy, food-safe finish. The most painterly pottery technique.
Carving
Cut designs into leather-hard clay using loop tools, knives, or dental picks. Create anything from simple lines to elaborate floral patterns. The depth of the carving catches shadows and glaze pooling, adding dimension. Best on pieces with slightly thicker walls to allow cutting depth.
Slip Trailing
Squeeze liquid clay (slip) through a fine-tipped bottle onto the surface, like decorating a cake. Creates raised lines and dots that add texture you can feel. Use colored slips for contrast. Apply at the leather-hard stage when the surface is damp enough for the slip to bond.
Sgraffito
Apply a layer of colored slip or underglaze to the surface, let it stiffen, then scratch through it to reveal the clay beneath. The contrast between dark slip and light clay (or the reverse) creates bold graphic designs. Use a needle tool for fine lines, loop tools for broad strokes.
Mishima (Inlay)
Carve a pattern into leather-hard clay, fill the carved lines with contrasting colored slip, then scrape the surface clean. The slip remains only in the carved grooves, creating precise, inlaid designs. Korean in origin, it produces clean, geometric patterns with stunning contrast.
Decoration Timeline — When to Apply Each Technique
- Wet clay (just thrown): Finger marks, rib textures, throwing rings left intentional
- Soft leather-hard: Stamping, slip trailing, combing, paddling with textured paddles
- Firm leather-hard: Carving, sgraffito, mishima inlay, faceting
- Bone dry / bisqueware: Underglaze painting, underglaze pencils, wax resist patterns
- After glaze firing: Overglaze decals, china paint, luster application (requires a third firing)
Combining Techniques
The most compelling pottery combines multiple decoration methods. Carve a pattern, fill it with colored slip (mishima), then add underglaze accents. Or stamp a texture, wash underglaze over it, then wipe the high points clean — the color stays in the recesses, highlighting the texture.
- Stamp + glaze wash — Texture catches pooling glaze for depth
- Sgraffito + underglaze layers — Scratch through multiple colors for complex imagery
- Carving + wax resist — Glaze fills carved areas, wax keeps surfaces bare for contrast
- Slip trail + sgraffito — Raised lines as borders, scratched designs within