Round Napkin Rings Casting Mold

The Round Napkin Rings mold from Colour de Verre casts two round napkin rings in a single firing. Each finished ring measures 3.25 inches (84 mm) in diameter. The mold footprint is 4.75 inches by 9 inches by 1 inch (12 x 23 x 2.5 cm), and each cavity takes about 75 grams of frit.

Prime the cavities before every use with ZYP BN Lubricoat or Hotline Primo Primer, fill with your choice of frit colors and mesh, and fire. Colour de Verre notes that when the mold is primed with ZYP BN Lubricoat, little to no cold-working is needed for a polished finish. Like all ceramic casting molds, this one is COE agnostic and reusable across many firings with proper care.

What does the Round Napkin Rings mold make?
It casts two round napkin rings per firing, each 3.25 inches (84 mm) in diameter. They work well as table accessories or as personalized glass gifts.

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

How much glass do I need per ring?
Colour de Verre lists about 75 grams of frit per cavity. Weigh your glass and test a first run when the result matters.

How do I prep the mold before casting?
Prime the cavities before every use with ZYP BN Lubricoat or Hotline Primo Primer and let the primer dry completely before adding glass. Re-prime between firings.

Specifications

• SKU: 181433
• Manufacturer: Colour de Verre
• Makes: 2 round napkin rings
• Finished piece size: 3.25 inches (84 mm) in diameter each
• Mold size: 4.75 inches L x 9 inches W x 1 inch H (12 x 23 x 2.5 cm)
• Suggested fill weight: about 75 grams per ring
• Material: ceramic kiln casting 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 cavities before every use with ZYP Boron Nitride Mold Primer or Hotline Primo Primer, and let it dry completely before adding glass so the pieces release cleanly.
• Fill each cavity with your choice of frit colors and mesh. Each ring takes about 75 grams of frit.
• When primed with ZYP BN Lubricoat, little to no cold-working is typically needed for a polished finish.
• The mold is COE agnostic. Use a full fuse schedule matched to your glass.
• Let the kiln cool fully before removing the cast rings. Re-prime the mold before the next firing.

Colour de Verre Suggested Firing Schedule

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

• Prime the mold before every use and let the primer dry completely.
• Heat no faster than about 350 F (195 C) per hour.
• Fire to no more than about 1450 F (785 C).
• Add a controlled cool and include an anneal soak suited to the COE glass you are using.

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

Description updated: July 6, 2026

Spot an error or have feedback on this description? Report it here.