Bullseye Glass Mold #8744, Oval 15.4"

The Oval 15.4 in mold from Bullseye Glass (design number 8744) is a ceramic slumping form that shapes a glass sheet or fused blank into a smooth oval. The outer footprint measures 15.4 inches by 9.8 inches, with a depth of 1.7 inches, giving you a broad oval suited to plates, platters, and decorative serving pieces. Check these outer dimensions against your kiln shelf before cutting glass, since the molds are handmade and individual pieces may vary slightly in size.

The form is slipcast from a specially formulated clay body by Creative Ceramics in Europe and imported by Bullseye Glass. The surface is exceptionally smooth and accepts kiln wash uniformly, giving you an even coating and consistent release across firings. Like all ceramic slumping molds, it is COE agnostic and reusable with proper prep and re-coating between firings.

What does the Oval 15.4 in mold make?
It shapes a glass sheet or fused blank into an oval form. The mold has an outer span of 15.4 inches by 9.8 inches and a depth of 1.7 inches, and the finished piece takes that oval shape.

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

How do I size my glass blank?
Measure your mold before cutting glass rather than relying on the published outer dimensions, since the molds are handmade and vary slightly in size. The outer dimensions (15.4 x 9.8 x 1.7 in) are for kiln fit; the usable forming surface will be somewhat smaller.

How do I prep the mold before slumping?
Coat the forming surface with a kiln wash such as Hotline Primo Primer and let it dry completely before placing your glass. The slipcast surface accepts kiln wash uniformly for even coverage. Re-coat between firings as needed for consistent release.

Specifications

• SKU: 157511
• Manufacturer: Bullseye Glass (design number 8744, item 008744-MOLD-M-EACH; slipcast by Creative Ceramics, imported by Bullseye Glass)
• Store model code: BG8744
• Shape: oval
• Outer dimensions (for kiln fit): 15.4 in L x 9.8 in W x 1.7 in D (39 x 25 x 4 cm)
• Material: slipcast ceramic, exceptionally smooth surface, accepts kiln wash uniformly, reusable
• Glass: any COE (COE agnostic)
• Note: molds are handmade; measure your mold before cutting glass

Working Notes

These are guidelines, not guarantees. Every kiln fires differently, so test a small piece first and follow Bullseye's published slumping schedule for your glass and mold depth.

• Coat the forming surface with kiln wash and let it dry completely before placing your glass. For an alternative mold release, you may use a boron nitride spray such as ZYP Boron Nitride Mold Primer. Re-coat between firings as needed.
• Measure the mold before cutting your glass blank. The outer dimensions (15.4 x 9.8 x 1.7 in) are for checking kiln fit; the actual forming surface is smaller. Because molds are handmade, individual pieces vary slightly.
• Center your glass blank on the forming surface and confirm positioning before closing the kiln.
• The mold is COE agnostic. Adjust the anneal soak temperature to match your glass: about 900 F for COE90 or 950 F for COE96.
• Visually confirm the slump during firing if your kiln allows and adjust temperature as needed. Let the kiln cool fully before removing the piece.
• Re-coat the forming surface with kiln wash before each firing.

Bullseye Suggested Slumping Schedule

This is a suggested starting schedule based on slumping 6mm glass in a Paragon GL24, not a guarantee. Every kiln fires differently. Follow Bullseye's published slumping schedule for your glass and mold, and test a small piece first before committing to a full run.

*AFAP = as fast as possible (kiln drops at its natural rate, door closed). Segment 2 is the anneal soak; 900 F is the Bullseye recommended anneal point for COE90 glass. If using COE96, adjust this soak to 950 F. Segment 4 is a natural cool 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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