Bullseye Glass Mold #8455, Oval Dish 11.3"

The Oval Dish mold from Bullseye Glass (design #8455) is a ceramic slumping form that shapes a single oval dish measuring roughly 11.3 inches by 7.4 inches. A pre-cut sheet of fusible glass, or a previously fused blank, is laid over the form and fired so the glass softens and settles into the oval shape by gravity.

The mold is slipcast from a specially formulated clay body by Creative Ceramics in Europe and imported by Bullseye Glass. The forming surface is exceptionally smooth and accepts kiln wash uniformly. The outer dimensions are 11.3 by 7.4 by 1.5 inches (29 by 19 by 4 cm). Because these molds are handmade, individual pieces vary slightly in size, so measure your mold before cutting glass. It is reusable across many firings with proper care.

What does this mold make?
It slumps one oval glass dish per firing. The outer mold measures 11.3 by 7.4 inches, so measure the actual mold you receive and cut your glass to fit.

How do I use this mold?
Place a pre-cut sheet or previously fused blank of fusible glass over the prepared mold surface. Fire slowly so the glass softens and drapes into the oval form by gravity, then cool with a controlled anneal before opening the kiln.

What COE glass can I use?
Any COE. Ceramic slumping molds are COE agnostic, so the same mold works with COE90, COE96, or other fusible glass. Match your slumping schedule to the glass you are using.

How do I prep the mold?
Coat the forming surface with a kiln wash such as Hotline Primo Primer or a shelf primer and let it dry completely before placing glass. Recoat between firings as needed.

Specifications

• SKU: 152854
• Manufacturer: Bullseye Glass (BG8455; made by Creative Ceramics in Europe, imported by Bullseye)
• Makes: 1 oval dish
• Outer mold dimensions: 11.3 in x 7.4 in x 1.5 in (29 x 19 x 4 cm)
• Note on sizing: Molds are handmade and vary slightly. Measure your mold before cutting glass.
• Material: slipcast ceramic, reusable
• Glass: any COE (COE agnostic)

Working Notes

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

• Coat the mold forming surface with kiln wash or a shelf primer such as ZYP Boron Nitride Mold Primer and let it dry completely before placing glass.
• Place a pre-cut sheet or fused blank over the mold, sized to fit the oval. Measure your mold first, since handmade molds vary slightly from piece to piece.
• Ramp slowly to slumping temperature to avoid thermal shock. Visually confirm the glass has fully settled into the form before moving to the anneal phase.
• Cool in a controlled way with an anneal soak appropriate for your glass (about 900 F for COE90, 950 F for COE96), then a slow cool to room temperature.
• Recoat the mold with kiln wash between firings as needed.

Bullseye Suggested Slumping Schedule

This is a suggested starting schedule for slumping 6mm pieces in a Paragon GL24, not a guarantee. Every kiln fires differently and glass styles vary in viscosity. Visually confirm the slump during firing and adjust the schedule for your glass and kiln.

AFAP means as fast as possible. Segment 4 lets the kiln cool naturally to room temperature with the door closed.

Helpful downloads: Suggested Slumping Schedules from Bullseye Glass (PDF)

Description updated: July 6, 2026

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