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Pinholing
When small dots of unglazed or depressed areas appear in the glaze surface, this is called "pinholing". Pinholing occurs when gases in the glaze and clay bubble up to the surface. The gas bubbles pop and a 'hole' appears, which doesn't fuse over.
Remedies:
· Fire the glaze higher
· Soak the kiln
· Wipe all dust off bisque ware
· Spray bisque ware lightly with water prior to glazing
Guru Spotlight |
Carma Spence-Pothitt |