TL;DR: To create porcelain figurines, mix porcelain slip with a deflocculant, pour it into a plaster mold, and let it set before demolding. Then carefully clean, assemble, fire, and glaze the piece to achieve a durable, translucent sculpture.
Step 1: Prepare the Porcelain Slip
Purchase pre-mixed porcelain slip or blend dry porcelain clay with water and a deflocculant like sodium silicate. Aim for a consistency similar to heavy cream. Stir slowly to avoid air bubbles, then let the slip rest for 24 hours.
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Step 2: Cast in a Plaster Mold
Secure your two-part plaster mold with rubber bands. Pour the slip into the mold’s sprue hole until full. Wait 10–15 minutes for the plaster to absorb water, forming a wall. Pour out the excess slip, leaving a hollow cast. Let it dry until firm but slightly damp.
Step 3: Remove and Clean
Open the mold gently and remove the fragile figurine. Use a damp sponge and a fettling knife to smooth seams and mold lines. Attach separate parts (arms, head) with slip as “glue,” pressing gently.
Step 4: Bisque Fire
Allow the figurine to air-dry completely for 2–3 days. Fire in a kiln to cone 06 (about 1828°F / 998°C). This hardens the porcelain without melting it.
Step 5: Glaze and Final Fire
Apply a thin, even coat of porcelain glaze using a soft brush. Wipe the base clean. Fire again to cone 6 (about 2232°F / 1222°C) for a glossy, translucent finish.
Tips for Stunning Figurines
Work in a dust-free space. Keep molds dry between pours. Use fine tools for details. Test glaze on scrap pieces first.
FAQ
Q: Can I use air-dry clay instead of porcelain?
A: No, air-dry clay lacks porcelain’s translucency and strength. Only true porcelain clay fires to a durable, vitrified state.
Q: How do I prevent cracking during firing?
A: Ensure the piece is bone-dry before bisque firing, and heat the kiln slowly (under 200°F per hour) up to 1000°F.
Q: What’s the best way to add fine details like fingers?
A: Use a small brush with slip to build up details, or carve into leather-hard porcelain with a needle tool before it dries.
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