Large Round Slump Ring Mold

The Large Round Slump Ring Mold from Creative Paradise is a ceramic ring form that produces round glass dishes with a completely flat bottom. A pre-made glass blank is laid over the ring, which rests on a primed kiln shelf or kiln shelf paper. As the kiln heats, the glass softens and drapes over the ring by gravity, creating a dish where the center hangs down to form a flat, even base.

The ring measures 11 inches in diameter and 1.75 inches tall, with a 4-inch center opening. The outer edge of the ring supports the rim of the glass while the unsupported center droops through the opening, which is what gives the finished dish its stable, flat base. Like all ceramic slumping forms, this mold is COE agnostic and reusable across many firings when properly prepped.

What does the Large Round Slump Ring Mold make?
It makes a round glass dish with a flat bottom. The 11-inch ring supports the outer rim of the glass while the center slumps through the 4-inch opening, producing an even, stable base on the finished dish.

How does slumping over a ring form work?
A pre-made glass blank is centered over the ring, which sits on a primed kiln shelf or kiln shelf paper. Heat softens the glass and gravity pulls the unsupported center down through the ring opening, shaping the dish. The glass sags through the ring until it reaches the kiln shelf below, which is what gives the finished piece its flat bottom.

What size glass blank should I use?
Use a blank that spans the full 11-inch outer diameter of the ring so the rim is fully supported during the slump. The flat bottom of the finished dish corresponds to the center glass that droops through the 4-inch opening.

What COE glass works with this mold?
Any COE. Ceramic slumping forms are COE agnostic, so the same ring works with COE96, COE90, or other fusible glass. Match your firing schedule to the glass you are using.

How do I prep the mold before use?
Prime the top surface of the ring with a boron nitride spray or kiln wash and let it dry completely before placing your glass. Set the ring on a primed kiln shelf or on kiln shelf paper before firing.

Specifications

• SKU: 164435
• Manufacturer: Creative Paradise (CPI.GM230)
• Makes: 1 round dish per firing
• Finished piece size: approximately 11 inches diameter
• Mold size: 11 inches diameter x 1.75 inches tall
• Center opening: 4 inches diameter
• Material: ceramic kiln slumping mold, reusable
• Glass: any COE (COE agnostic)

Working Notes

These are guidelines, not guarantees. Every kiln fires a little differently, so test a small run first when the result matters and follow a slumping schedule suited to your glass and kiln.

• Prime the top surface of the ring with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer, or a kiln wash such as Hotline Primo Primer, and let it dry completely before placing your glass so the glass does not stick.
• Set the ring on a primed kiln shelf or on kiln shelf paper, then lay your pre-fused or sheet glass blank centered over the ring so it covers the full 11-inch outer diameter.
• The glass drapes over the ring by gravity as the kiln heats, pulling the center down through the 4-inch opening to form a flat dish base.
• The mold is COE agnostic. Use a slump schedule matched to your glass, adjusting the final anneal soak for your COE.
• Let the kiln cool fully before removing the slumped piece. Re-coat the mold with primer as needed between firings.
• The Slide Hi Temp brand separator is not recommended with these molds.

Creative Paradise Suggested Firing Schedule

This is a suggested COE96 starting schedule, not a guarantee. Every kiln fires differently. Test a small run and adjust the schedule for your glass and kiln.

Slump (COE96, double layer):

*Segment 3 is the anneal soak at 950 F for COE96. If using COE90, adjust this temperature to 900 F.

Helpful downloads: Drop Center Bowl Tutorial (PDF)

Description updated: July 6, 2026

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