Sanding Pad

What it is

Sanding in ceramics happens after the bisque firing, on a fired but unglazed surface. Its main job is the foot ring: a foot that has been trimmed cleanly still has a slightly abrasive edge, and a few passes with a fine abrasive pad turn it smooth against a table top.

This is the single most dust-hazardous task in the studio. Sanding fired clay produces fine, respirable crystalline silica, and the particles are small enough to stay airborne for hours. The rule is absolute: never sand dry, and never sand without respiratory protection.

The practical method is wet sanding. A silicon carbide or diamond pad, a shallow tray of water, and enough water on the surface that the dust is captured in slurry rather than becoming airborne. The pad is worked in one direction until the edge is soft to the touch, then the piece is rinsed and dried before glazing.

How to use it well

• Soak the pad and the piece; keep a film of water on the surface throughout.
• Sand in one direction, then rotate the piece 90° for a second pass to avoid flat spots.
• Run a finger along the foot — you are aiming for soft, not for a mirror polish.
• Rinse the piece thoroughly and let it dry completely before glazing; trapped dust causes glaze defects.

Safety notes

• NEVER sand dry. Fired clay dust is respirable crystalline silica and a serious lung hazard.
• Wear an N95/P100 respirator and eye protection even when wet sanding.
• Dispose of sanding slurry as solid waste — let it settle and bin the sludge, never pour it down a drain.
• Work over a tray, not over an open floor, to contain the slurry.

Compatible materials

Clay bodies

• Bisque-fired stoneware
• Earthenware
• Porcelain

Glazes & surface

• Applied after sanding, before glazing

Where it sits in the process

Turning, cutting and finishing leather-hard work.

Trimming  Trimming & Cutting  Entry tier

Browse every tool in this stage from the Trimming & Cutting category.