Bullseye Glass Mold #8985, Soft Edge Platter 9.1"

The Soft Edge Platter mold from Bullseye Glass slumps a pre-cut glass blank into a round platter with a gently curved rim in a single firing. A glass blank is placed over the form, heated until the glass softens, and gravity settles it into the platter shape. The outer mold footprint is 9.1 by 9.1 inches with a 0.9 inch height, sized for checking kiln fit before loading.

Made by Creative Ceramics in Europe and imported by Bullseye Glass, the mold is slipcast from a specially formulated clay body with an exceptionally smooth surface that accepts kiln wash uniformly and does not crack under repeated proper use. The inside base dimension is 3 by 3 inches. Molds are handmade and vary slightly in size, so measure your mold before cutting your glass blank. Like all ceramic slumping forms, this mold is COE agnostic and works with any fusible glass.

What does the Soft Edge Platter mold make?
It slumps one round platter per firing with a softly curved rim. The outer mold footprint is 9.1 by 9.1 inches and the inside base is 3 by 3 inches. Place a glass blank over the form and fire it so the glass softens and settles into the platter shape by gravity.

What COE glass can I use with this mold?
Any COE. Ceramic slumping molds are COE agnostic, so the same form works with COE90, COE96, or other fusible glass. Match the firing schedule to the COE of 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 and let it dry fully before placing your glass blank. The smooth slipcast surface accepts kiln wash uniformly. Re-coat as needed between firings.

What size glass blank should I cut for this mold?
Measure your mold before cutting, since these are handmade and can vary slightly from the nominal dimension. The listed outer mold size is 9.1 inches, but cut to your measured mold to get the right fit.

Specifications

• SKU: 153706
• Manufacturer: Bullseye Glass (BG8985, made by Creative Ceramics; Bullseye item 008985)
• Makes: 1 soft edge platter
• Outer mold size: 9.1 x 9.1 x 0.9 in (23 x 23 x 2 cm)
• Inside base: 3 x 3 in (8 x 8 cm)
• Material: slipcast clay body, reusable ceramic slumping form
• Glass: any COE (COE agnostic)
• Note: molds are handmade and vary slightly; measure before cutting glass

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 boron nitride primer such as ZYP Boron Nitride Mold Primer and let it dry completely before placing your glass blank so the glass does not stick to the mold.
• These molds are handmade and vary slightly in size. Measure your mold before cutting your glass blank rather than relying solely on the nominal dimension.
• 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 is complete during firing before beginning the cool cycle. Let the kiln cool fully before removing the slumped piece. Re-coat the mold 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 kiln, not a guarantee. Every kiln fires differently and glass styles vary in viscosity. Follow Bullseye's published Suggested Slumping Schedule for your glass and mold depth, visually confirm the slump during firing, and test a small piece first.

Segment 4 is the final cool: let the kiln cool at its natural rate with the door closed to room temperature. The anneal soak in Segment 2 is listed at 900 F for COE90. Adjust Segment 2 to 950 F for COE96 glass.

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

Description updated: July 6, 2026

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