The Art of Firing
Z-Ring Advantages
- Eliminates cold zones on firing tray
- Completely even heat across the tray surface
- Eliminates dull glaze finishes (fire scale) caused by uneven temperature in firing zone
- Optimizes depth of shade vitality of all layered ceramic applications
- Adjustable ring accommodates larger cases

Heat Pattern with Wonder Z-Ring
- Eliminates cold zones on your firing tray
- Completely even heat across tray surface
- Eliminates dull glaze finishes (fire scale) from uneven temperature in firing zone
- Eliminates internal thermal stress caused by uneven vertical muffle heat zones
- Optimizes the optical refraction (depth of shade) vitality of all layered ceramic applications
- Adjustable ring accommodates larger cases

Uneven Heat Pattern in Standard Muffle Chamber
The spaces between the coils create vertical cold zones creating uneven heating across the tray surface (horizontally).