Large Eggs Kiln Casting Mold

The Large Eggs Kiln Casting Mold from Creative Paradise casts three egg-shaped glass pieces in a single firing. The mold has one large cavity producing a piece 3.5 inches long by 2.5 inches wide, and two smaller cavities each producing a piece 3 inches long by 2 inches wide. The mold footprint is 6.75 inches by 5.5 inches.

Like all ceramic casting molds, this one is COE agnostic. Fill the large cavity with about 175 grams of glass and each small cavity with about 85 grams, using frit, billets, or stacked sheet scrap. As a kiln casting mold it is reusable across many firings when prepped and cared for properly.

What does the Large Eggs mold make?
It casts three egg-shaped glass pieces in one firing: one large piece at 3.5 inches by 2.5 inches and two small pieces each at 3 inches by 2 inches. They suit seasonal decorations, sculptural accents, and nature-themed art projects.

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 cavity?
Creative Paradise lists about 175 grams for the large cavity and about 85 grams for each small cavity. Weigh your glass and test a first run when the result matters.

How do I prep the mold before casting?
Coat the cavities with a kiln shelf primer such as a boron nitride spray (for example ZYP) or a kiln wash such as Hotline Primo Primer, and let it dry completely before adding glass. Re coat as needed between firings.

Specifications

• SKU: 171044
• Manufacturer: Creative Paradise (CPI.LF200)
• Makes: 3 egg-shaped pieces (1 large, 2 small)
• Finished piece size: Large 3.5 in L x 2.5 in W, Small 3 in L x 2 in W each
• Mold size: 6.75 inches L x 5.5 inches W
• Suggested fill weight: Large about 175 grams, Small about 85 grams each
• 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 a casting schedule suited to your glass and kiln.

• Prime all three cavities with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer, or a kiln wash, and let it dry completely before adding glass so the glass does not stick.
• Fill with frit, small billets, or stacked sheet scrap. For a tack fired surface, the manufacturer suggests powder and fine frit filled uniformly to about a quarter inch.
• The mold is COE agnostic. Use a full fuse schedule matched to your glass, adjusting the final anneal soak for your COE.
• Let the kiln cool fully before removing the cast pieces. Re coat the mold with primer as needed between firings.
• The Slide Hi Temp brand separator is not recommended with these molds.

Creative Paradise Suggested Firing Schedule

This is a suggested COE96 starting schedule, not a guarantee. Every kiln fires differently. Test a small run and adjust the schedule for your glass and kiln.

Full Fuse (COE96):

Tack Fire (COE96): for a tack fired surface, fill uniformly to about a quarter inch with powder and fine frit.

*Segment 4 is the anneal soak at 950 F for COE96. If using COE90, adjust this temperature to 900 F.

Helpful downloads: Basic Frit Casting Tutorial (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)

Description updated: July 6, 2026

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