Out of the Kiln and Ready to Glaze
Once the kiln is cool enough to unload safely, the process is careful but straightforward. This is also when you inspect your work and prepare it for glazing.
Unloading Order
Unload from the top down, removing the top shelf first and working downward. This prevents you from accidentally knocking pieces on lower shelves while reaching over them.
- Remove pieces gently; bisqueware is stronger than greenware but still relatively fragile.
- Set pieces on a cushioned surface or a towel while inspecting them.
- Stack kiln shelves and posts neatly for the next loading.
Inspecting the Bisqueware
Now is the time to find any problems before glazing:
- Cracks: Run a fingernail across surfaces. Cracks feel like a slight catch. Look for hairline cracks especially at joins (handles, feet, lids).
- Crawling or black spots: Signs of trapped organic material or poor drying. Note for next time.
- Glaze drips on shelves: Chip these off immediately before they harden further.
A small crack at bisque stage can sometimes be filled with a slurry of the same clay body; it will fuse during the glaze firing. A large crack means the piece is lost.
Wiping Down
Before glazing, wipe every bisque piece with a damp sponge or cloth. This removes:
- Kiln dust and particles
- Fingerprints and oils (which can cause glaze to resist adhesion)
- Any loose bits from the kiln wash
Allow the pieces to dry completely after wiping before applying any glaze.
Pro Tip
Handle bisqueware as little as possible with bare hands. Natural skin oils create invisible barriers that prevent glaze from adhering evenly, leaving spots that look bare or crawled after the glaze firing.
Post-Bisque Prep Flow
After unloading:
- Inspect for structural issues
- Clean and dust off all pieces
- Group by glaze plan and clay body
A clean workflow here makes glazing faster and more consistent.
Did You Know?
Once bisqueware is clean and dry, it is ready for the ceramic glaze application covered in the next unit. The bisque firing transforms raw clay through sintering, bonding particles just enough to create a strong, porous surface that absorbs glaze evenly.
