7"-10" Plate Slumper Mold

The 7"-10" Plate Slumper Mold from Colour de Verre is a reusable ceramic mold designed to shape glass into plates and shallow bowls ranging from 7 to 10 inches in diameter. Built-in handholds make it easy to grip and position inside the kiln and to handle safely after firing, a practical feature for a mold you will use across many sessions.

Colour de Verre describes this slumper as a companion to their disk and floral formers. After fusing a flat glass blank on a disk or floral former, you transfer it to this slumper to give it a gently curved plate or bowl profile. The mold handles the full 7 to 10 inch diameter range, making it a versatile tool for both decorative pieces and functional serveware.

What does the 7"-10" Plate Slumper Mold make?
It shapes flat glass blanks into plates and shallow bowls from 7 to 10 inches in diameter. Colour de Verre positions it as a companion to their disk and floral formers.

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

How does slumping work with this mold?
Place a pre-fused flat glass blank onto the prepared mold surface. As the kiln heats, the glass softens and settles into the mold, taking the plate or shallow bowl profile. Slumping fires to lower temperatures than fusing or casting.

What are the handholds for?
The built-in handholds let you grip and position the mold inside the kiln and carry it after firing without handling the mold body directly.

Specifications

• SKU: 181808
• Manufacturer: Colour de Verre
• Makes: glass plates and shallow bowls
• Finished piece size: 7 to 10 inches in diameter
• Features: built-in handholds
• Material: ceramic kiln slumping mold, reusable
• Glass: any COE (COE agnostic)

Working Notes

These are guidelines, not guarantees. Every kiln fires a little differently, so test a small run first when the result matters and follow the Colour de Verre project sheet for this mold.

• Prime the mold surface before every use with ZYP Boron Nitride Mold Primer or Hotline Primo Primer. Let it dry completely before placing glass so the glass does not stick.
• Place your pre-fused flat glass blank onto the prepared mold surface. The glass will soften and settle into the plate or shallow bowl profile as the kiln heats.
• The mold is COE agnostic. Use a slumping schedule matched to your glass type, and adjust the final anneal soak temperature for your COE.
• Re-prime the mold as needed between firings. Let the kiln cool fully to room temperature before removing slumped pieces.

Suggested Firing Schedule

This is a suggested starting point, not a guarantee. Every kiln fires differently. Follow the Colour de Verre project sheet for this mold and test a small run first before committing to a full batch.

• Heat no faster than about 350 F (195 C) per hour.
• Fire to no more than about 1450 F (785 C). Slumping typically occurs at lower temperatures than fusing, so monitor your piece and adjust your target temperature to achieve the profile you want.
• Add an anneal soak at the end: about 950 F for COE96, or about 900 F for COE90.
• Cool slowly and let the kiln reach room temperature before opening.

Helpful downloads: Priming with ZYP Spray (PDF) · Tricks of the Trade (PDF)

Description updated: July 6, 2026

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