The Technique That Saves Shelves

Applying wax seems trivial: brush it on and you're done. But small errors in application cause big problems in the glaze kiln. These habits make the difference between a clean result and a pot glued to the shelf.

Waxing the Foot Ring

1. Place the pot upside down on a banding wheel or turntable.
2. With the wheel spinning, apply liquid wax resist with a soft brush to the entire foot ring: the flat face that contacts the shelf, and a few millimetres up the outer and inner walls of the foot ring.
3. Apply a complete, solid coat. Missing a spot invites glaze to creep under the foot.
4. Let the wax dry completely before glazing. Wax dries quickly, usually 5–10 minutes at room temperature. If you glaze over wet wax, the glaze partially sticks and you lose the clean resist effect.

Checking Coverage

Hold the waxed pot sideways in light and look across the surface. Wax has a slight sheen when dry. Any dull patches are spots the wax missed.

Waxing for Decoration

When waxing patterns over a first glaze layer:

• Apply wax over the fully dry first glaze layer.
• Let the wax dry completely.
• Apply the second glaze. It will bead up and roll off the waxed areas.
• Do not scrub the second glaze on; gentle application only. Scrubbing can push glaze under the wax.

Cleaning Brushes

Wax ruins brushes permanently if allowed to dry in the bristles. Clean brushes immediately after use with warm soapy water. Dedicated wax brushes (used only for wax) are a good investment.

Pro Tip

The kiln burns wax away completely; you do not need to remove it before firing. But always check the foot of every pot before loading the glaze kiln just to be safe.

Foot-Safety Routine

Right before loading:

• Turn each pot over and visually inspect the foot ring
• Feel for any rough or gritty glaze specks on the base
• Re-wipe suspect spots with a damp sponge

This last 60-second pass avoids most shelf disasters.

Keep Exploring

The temperatures that burn wax away are the same ones that drive the vitrification of the glaze coating, fusing it into a glassy surface. For a broader look at how glaze application methods work together, the Wikipedia article on ceramic glaze covers dipping, pouring, brushing, and resist techniques in historical and modern contexts.

Common Mistakes and Quick Fixes

• Glazing before wax dries: Wait until the sheen changes and surface feels dry, or resist lines fail.
• Scrubbing glaze over wax: Float the glaze on gently near resist edges.
• Rushing foot checks during loading: Build a final underside inspection into every kiln load.
• Letting wax dry in brushes: Clean immediately in warm soapy water or retire the brush to wax-only use.

Practice Exercise

On one bisque test tile, paint four wax stripes with different drying times before glazing over them. Fire and compare edge quality. This teaches exactly how drying time and brushing pressure change resist sharpness.