Patty Gray Large Round Slumping Mold

The Patty Gray Large Round Slumping Mold from Creative Paradise is a 12 inch diameter ceramic slump form that shapes a pre-made fused blank or sheet glass into a round bowl with a slump depth of 2.75 inches. The form itself stands 3.5 inches tall, giving the glass room to settle gradually into a consistent, even curve during the firing. The 12 inch diameter requires a modest amount of glass, which makes it approachable for beginners and practical for fusers at any level.

Like all ceramic kiln molds, this one is COE agnostic. Place a pre-cut fused blank or sheet glass over the form, coat the surface with a kiln-safe primer, and fire with a slump schedule suited to your glass. The mold is reusable across many firings when prepped and cared for properly.

What does the Patty Gray Large Round mold make?
It slumps a flat glass blank into a round bowl form, approximately 12 inches in diameter and 2.75 inches deep.

What size glass blank do I need?
You need a round blank or sheet cut to roughly 12 inches. Fuse or pre-cut your blank first, then slump it over the form in a second firing.

What COE glass can I use?
Any COE. Ceramic slumping molds are COE agnostic, so the same mold 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 slumping?
Coat the form with a kiln shelf primer such as a boron nitride spray (for example ZYP) or a kiln wash such as Hotline Primo Primer, and let it dry completely before placing the glass. Re-coat as needed between firings.

Specifications

• SKU: 156200
• Manufacturer: Creative Paradise (GM125)
• Makes: 1 round slumped bowl
• Finished piece size: 12 inches diameter, about 2.75 inches deep
• Mold size: 12 inches diameter x 3.5 inches tall
• Slump depth: 2.75 inches
• 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 slump schedule suited to your glass and kiln.

• Prime the mold surface with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer, or a kiln wash, and let it dry completely before placing the glass so it does not stick.
• Place a pre-made fused blank or pre-cut sheet glass over the form. The glass will soften and drape into the form's curve during the firing.
• 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):

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

Helpful downloads: Mermaid Bowl Tutorial (PDF)

Description updated: July 6, 2026

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