Bullseye Glass Mold #8935 Four-Square Dish 6.7"

The Four-Square Dish mold from Bullseye Glass, design number 8935, slumps a flat sheet or fused glass blank into a four-square dish approximately 6.7 inches across and 0.9 inches deep. Slipcast from a specially formulated clay body by Creative Ceramics in Europe and imported by Bullseye Glass, it has an exceptionally smooth surface that accepts kiln wash uniformly and holds up under repeated proper firings.

To use it, a pre-cut glass sheet or fused blank is placed over the mold form, then fired so the glass softens and takes the shape by gravity. The outer mold dimensions are 6.7 by 6.7 by 0.9 inches (17 by 17 by 2 cm), useful for planning kiln placement. These molds are made by hand, so individual pieces vary slightly in size; measure your mold before cutting glass to fit.

What does the Four-Square Dish mold make?
It slumps a flat or fused glass sheet into a four-square dish roughly 6.7 inches across and 0.9 inches deep. The finished piece is suited to use as a small serving dish, decorative tray, or display object.

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

How do I prepare the mold before firing?
Coat the forming surface with a kiln wash or shelf primer and let it dry fully before placing glass. The smooth surface accepts kiln wash uniformly. Recoat between firings as needed.

How large should I cut my glass?
Measure your actual mold before cutting. These molds are handmade and vary slightly between pieces, so the listed dimensions describe the outer footprint for kiln fit planning, not a cutting template.

Specifications

• SKU: 7744
• Manufacturer: Bullseye Glass (made by Creative Ceramics, imported by Bullseye)
• Bullseye design number: #8935 (item 008935-MOLD-M-EACH; store code BG8935)
• Makes: four-square dish
• Mold outer dimensions: 6.7 x 6.7 x 0.9 in (17 x 17 x 2 cm)
• Material: slipcast ceramic slumping mold, reusable
• Glass: any COE (COE agnostic)

Working Notes

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

• Coat the forming surface with a kiln wash or a boron nitride primer such as ZYP Boron Nitride Mold Primer, and let it dry completely before placing glass.
• Measure the mold before cutting glass. Individual handmade pieces vary slightly in size, and the listed dimensions are for kiln fit planning only.
• Place the prepared glass sheet or fused blank over the mold form and fire on a slumping schedule matched to your glass and kiln.
• Visually confirm the slump during firing and adjust the temperature or hold time if the glass has not fully settled into the form.
• 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 based on slumping a 6 mm piece in a Paragon GL24 kiln, not a guarantee. Every kiln fires differently. Visually confirm the slump during firing and adjust for your glass and kiln.

AFAP means as fast as possible. Segment 4 is a natural cool at the kiln's own rate, door closed, down to room temperature. The anneal soak in segment 2 is set at 900 F, which suits COE90 glass; adjust to 950 F if you are using COE96 glass.

Description updated: July 6, 2026

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