Slipcast porcelain has a refined, smooth surface and precise form that sets it apart from wheel-thrown work. Caring for it correctly keeps it looking its best and ensures it lasts for years. Here is what you need to know about caring for slipcast porcelain specifically.
What Makes Slipcast Porcelain Different
Slipcast pieces are formed by pouring liquid clay into plaster molds — the result is a very consistent wall thickness and a smooth, precise surface that captures mold detail exactly. Fully fired slipcast porcelain is dense, vitrified, and non-porous — it does not absorb liquids or harbor bacteria when the glaze is intact and properly fired.
The thinness that makes slipcast porcelain elegant also makes it slightly more vulnerable to impact than thicker thrown pieces. Handle with appropriate care.
Washing
Hand washing is always the preferred method for slipcast porcelain. Use warm water and a mild dish soap with a soft sponge or cloth. Avoid abrasive scourers — even fine scratches on a porcelain glaze surface are visible and dull the finish over time.
Slipcast porcelain can typically go in the dishwasher on a gentle cycle, but repeated dishwasher use will eventually dull the glaze surface. For pieces you want to keep looking their best long term, hand wash.
Microwave and Oven Use
Fully vitrified slipcast porcelain without metallic glazes is microwave safe. For oven use, slipcast porcelain can typically handle moderate oven temperatures — but avoid placing a cold piece directly into a hot oven. Allow the piece to come to room temperature first to prevent thermal shock.
Do not use slipcast porcelain on a stovetop burner or directly over a flame — the direct heat source creates uneven thermal stress that can crack even well-fired porcelain.
Avoiding Thermal Shock
Thermal shock — a sudden, extreme temperature change — is the most common cause of cracking in porcelain. Avoid:
Pouring boiling water into a cold piece — warm it first with hot tap water
Taking a piece from the freezer directly to the microwave
Placing a hot piece on a cold, wet surface
Washing a very hot piece in cold water immediately after use
Stacking and Storage
Store slipcast porcelain pieces with felt pads, cloth, or paper towels between stacked pieces. The smooth, precise bases of slipcast work can scratch glaze surfaces when stacked directly. A simple cloth between each piece prevents this entirely.
Removing Stains
The smooth, dense surface of slipcast porcelain resists staining better than rougher surfaces. For coffee or tea staining, soak in warm water with a small amount of baking soda for 30 minutes and wipe clean. Bar Keepers Friend on a damp sponge removes most stubborn stains without scratching — rinse thoroughly afterward.
I am a visually impaired ceramic artist. I have been making for around 8 years now. I specialize in functional colorful pottery. Mainly nerikome and other decorative processes.
