Bullseye Glass Mold #8964, Mini Lamp Bender 6" Slumping Mold

The Mini Lamp Bender 6 inch slumping form from Bullseye Glass, mold number 8964, shapes a flat glass blank into a gently curved lamp component in a single kiln firing. A cut glass sheet is placed on the form, then heated until it softens and gravity draws it down to follow the mold's curve. The result is a smooth, curved piece ready to fit into a lamp assembly or to stand alone as a curved decorative element.

The outer dimensions of the form are 6 by 4.9 by 2.1 inches, listed to help confirm kiln fit before loading. Because the molds are handmade from a specially formulated clay body by Creative Ceramics in Europe and imported and sold by Bullseye Glass, individual pieces vary slightly in size, so measure your specific mold before cutting glass. The surface is exceptionally smooth, accepts kiln wash uniformly, and does not crack under repeated proper use.

What does the Mini Lamp Bender 6 inch form make?
It slumps a flat glass blank into a curved lamp bender profile. The finished piece suits lamp shade assembly, curved decorative panels, or sculptural glass work where a gentle arc is needed.

How does slumping over this form work?
Cut a glass blank to fit the mold's forming surface, coat the surface with kiln wash, set the glass on the form, and fire to a slumping temperature. The glass softens and sags over the curve under gravity. Let the kiln cool fully before removing the finished piece.

What size glass blank do I use?
Cut a blank to cover the forming surface. Measure your specific mold before cutting, since these are handmade and individual pieces vary slightly from the listed outer dimensions.

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

How do I prep the mold before firing?
Coat the forming surface with a kiln wash such as Hotline Primo Primer and let it dry completely before placing glass on the form. Re coat between firings as needed.

Specifications

• SKU: 164853
• Manufacturer: Bullseye Glass (made by Creative Ceramics in Europe, imported by Bullseye Glass)
• Mold number: #8964 (store code BG8964, Bullseye item 008964)
• Outer dimensions (for kiln fit): 6 x 4.9 x 2.1 inches
• Note: Molds are handmade and vary slightly in size. Measure before cutting glass.
• Material: slipcast ceramic slumping form, reusable
• Glass: any COE (COE agnostic)

Working Notes

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

• Coat the forming surface with kiln wash or a boron nitride primer such as ZYP Boron Nitride Mold Primer, and let it dry completely before placing glass on the form.
• Measure your specific mold before cutting glass. These forms are handmade and individual pieces vary slightly from the listed outer dimensions.
• Place the glass blank on the form and fire slowly. Visually confirm the slump is complete during firing and adjust your schedule as needed for your kiln and glass.
• This form is COE agnostic. Adjust the anneal soak temperature to match your glass: 900 F is the anneal point used in the schedule below, suited to the glass fired in the reference kiln.
• Let the kiln cool fully before removing the slumped piece. Re coat the forming surface with kiln wash as needed between firings.

Bullseye Suggested Slumping Schedule

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

AFAP means as fast as possible: the kiln descends at its natural rate. Segment 2 is the anneal soak at 900 F. Segment 4 is a natural cool to room temperature with the door closed. Adjust the anneal soak in segment 2 if you are using a glass with a different annealing point.

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

Description updated: July 6, 2026

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