The Four Candle Bridge Slumper from Bullseye Glass (mold #8902) is a ceramic slumping form that shapes a flat glass blank into a finished candle bridge with four evenly spaced holders. Place a pre-cut sheet or fused blank over the form, fire the kiln slowly, and gravity draws the glass down to take the bridge shape.
The outer mold dimensions are 12.4 inches long by 5.7 inches wide by 1.6 inches tall (32 x 15 x 4 cm). These are the kiln-fit dimensions. Because the molds are handmade from a specially formulated clay body by Creative Ceramics in Europe and imported by Bullseye Glass, each piece varies slightly in size, so measure your mold before cutting glass. The surface is exceptionally smooth and accepts kiln wash uniformly, making prep straightforward.
What does the Four Candle Bridge Slumper make?
What size glass blank do I need?
What COE glass can I use?
How do I prep the mold before slumping? Hotline Primo Primer and let it dry completely before placing your glass. The smooth surface accepts kiln wash uniformly. Recoat as needed between firings.
Specifications
SKU: 164852Manufacturer: Bullseye Glass (design #8902, item 008902-MOLD-M-EACH; slipcast by Creative Ceramics in Europe, imported by Bullseye Glass)Makes: four-holder candle bridgeMold outer dimensions: 12.4 inches L x 5.7 inches W x 1.6 inches H (32 x 15 x 4 cm)Note: molds are handmade and vary slightly in size; measure before cutting glassMaterial: slipcast ceramic, reusableGlass: any COE (COE agnostic)Store model code: BG8902
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.
Measure your mold before cutting glass. These molds are handmade and vary slightly from piece to piece, so do not rely on the listed outer dimensions alone.
Coat the forming surface with kiln wash and let it dry completely before placing glass. The surface accepts kiln wash uniformly. You may also prime with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer . Recoat as needed between firings.
Place your pre-cut glass blank over the form. The glass softens as the kiln heats and drapes by gravity to take the bridge shape. Visually confirm the slump during firing.
The mold is COE agnostic. Use a slumping schedule matched to your glass and adjust the anneal soak for your COE (about 900 F for COE90 or 950 F for COE96).
Let the kiln cool fully before removing the slumped piece. Do not open the door during the anneal or cool phases.
Bullseye Suggested Slumping Schedule
This is a suggested starting schedule based on Bullseye's guidance for slumping 6mm pieces in a Paragon GL24 kiln, not a guarantee. Every kiln fires differently and glass viscosity varies by style. Visually confirm the slump during firing and adjust the schedule for your glass and kiln.
Segment Rate (F/hr) Temp (F) Hold 1 (slump) 250 1240 1:45 2 (anneal soak) AFAP 900 1:00 3 (anneal cool) 100 700 none 4 (cool to room) AFAP 70 door closed
AFAP means as fast as possible, at the kiln's natural rate. The anneal soak in segment 2 is listed at 900 F, which suits COE90 glass. If using COE96 glass, adjust the anneal soak temperature to 950 F. Segment 4 is a natural cool to room temperature with the kiln door closed.
Helpful downloads: Suggested Slumping Schedules from Bullseye Glass (PDF)
Description updated: July 6, 2026
Spot an error or have feedback on this description? Report it here .
