Holey Heart Trio Kiln Casting Mold

The Holey Heart Trio mold from Creative Paradise casts three heart shaped pieces in a single firing: one large heart at 1.5 inches and two small hearts at 1 inch each. Each heart features a hole through the center, making the finished pieces well suited to pendants, charms, and earring components that can be strung or wired directly. The mold footprint is 4.5 inches by 4.5 inches.

Like all ceramic casting molds, this one is COE agnostic. Fill each cavity with frit, small billets, or stacked sheet scrap and fuse to the heart shape. Creative Paradise lists roughly 10 grams of glass for the large cavity and 6 grams each for the two small cavities. The mold is reusable across many firings when prepped and cared for properly.

What does the Holey Heart Trio mold make?
It casts three heart shaped pieces in one firing: one large heart at 1.5 inches and two small hearts at 1 inch each. Each heart has a hole through the center, making the pieces easy to string or wire as pendants, charms, or earring components.

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 10 grams for the large heart and 6 grams each for the two small hearts. Fill weight can vary, so 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: 9296
• Manufacturer: Creative Paradise (CPI.LF73)
• Makes: 3 hearts (1 large, 2 small)
• Large finished piece size: 1.5 inches
• Small finished piece size: 1 inch each
• Mold size: 4.5 inches L x 4.5 inches W
• Suggested fill weight: about 10 grams (large), about 6 grams each (small)
• 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 the 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: Holey Mold Tutorial (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)

Description updated: July 6, 2026

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