Bullseye Glass Mold #8903, One Candle Bridge Slumper 7.2"

The One Candle Bridge Slumper from Bullseye Glass, design number 8903, is a slumping form that shapes a flat glass blank into a curved bridge or arch sized to hold a single candle. A pre-cut or pre-fused sheet is placed over the form, the kiln is heated slowly, and gravity draws the glass down over the contoured surface to produce the finished piece.

The outer mold measures 7.2 inches long by 5.1 inches wide by 2 inches tall (18 x 13 x 5 cm). These dimensions are for checking kiln fit; the mold is handmade and individual pieces vary slightly in size, so measure your specific mold before cutting your glass blank. It is slipcast from a specially formulated clay body by Creative Ceramics in Europe, imported and sold by Bullseye Glass. The smooth surface accepts kiln wash uniformly and does not crack under repeated proper use, making it a durable reusable slumping tool.

What does the One Candle Bridge Slumper make?
It slumps a flat glass blank into a curved bridge or arch sized to cradle a single candle, finished as a decorative candle holder.

How does slumping with this form work?
Cut a glass blank to fit the form, coat the forming surface with kiln wash, set the glass over the mold, and fire slowly. As the kiln heats, the glass softens and drapes over the form under its own weight, taking the bridge shape. Visually confirm the slump during firing and let the kiln cool fully before removing the piece.

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

How do I prep the mold before slumping?
Coat the forming surface with a kiln wash such as Hotline Primo Primer or a shelf primer and let it dry completely before placing your glass. The smooth slipcast surface accepts kiln wash uniformly for consistent releases. Recoat as needed between firings.

Specifications

• SKU: 3662
• Manufacturer: Bullseye Glass (made by Creative Ceramics, Europe; model BG8903, design #8903, item 008903-MOLD-M-EACH)
• Makes: one candle bridge
• Outer mold size: 7.2 x 5.1 x 2 in (18 x 13 x 5 cm)
• Material: slipcast ceramic kiln slumping form, reusable
• Glass: any COE (COE agnostic)

Working Notes

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

• Coat the forming surface with kiln wash or a shelf primer such as ZYP Boron Nitride Mold Primer and let it dry completely before placing your glass.
• Because molds are handmade and vary slightly in size, measure your specific mold before cutting your glass blank.
• Place the glass over the form and ramp slowly to slumping temperature. Visually confirm the slump during firing and advance to the anneal as soon as the glass has fully formed to avoid over-slumping or devitrification.
• The mold is COE agnostic. Use a slumping schedule matched to your glass and adjust the anneal soak temperature for your COE.
• Let the kiln cool fully before removing the piece. Recoat the mold with kiln wash as needed between firings.

Bullseye Suggested Slumping Schedule

This is a suggested starting schedule for slumping 6mm glass in a Paragon GL24 kiln, 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 (the controller ramps at maximum speed). Segment 4 lets the kiln cool to room temperature at its natural rate with the door closed. Adjust the anneal soak temperature in segment 2 for your specific glass type if not using standard Bullseye glass.

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

Description updated: July 6, 2026

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