Large Hearts Casting Mold

The Large Hearts Casting Mold from Creative Paradise casts two large heart shapes in a single firing. The two cavities differ slightly in proportion: the wide heart cavity measures 3.5 inches by 2.5 inches, and the slim heart cavity measures 3 inches by 2.75 inches. The mold footprint is 7 inches by 4.75 inches, giving each cavity room to produce a sizable decorative piece or cabochon.

Like all ceramic casting molds, this one is COE agnostic. Fill the cavities with frit, billets, or stacked sheet scrap and fuse to the heart shape. Creative Paradise lists fill weights of about 135 grams for the wide cavity and 130 grams for the slim cavity. As a kiln casting mold it is reusable across many firings when prepped and cared for properly.

What does the Large Hearts Casting Mold make?
It casts two large heart shapes in one firing. The wide heart measures 3.5 inches by 2.5 inches and the slim heart measures 3 inches by 2.75 inches. The pieces work well as cabochons, focal elements, or fused glass art pieces.

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 135 grams for the wide heart cavity and 130 grams for the slim heart 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: 170878
• Manufacturer: Creative Paradise (LF197)
• Makes: 2 heart shapes (wide and slim)
• Wide heart size: 3.5 inches L x 2.5 inches W
• Slim heart size: 3 inches L x 2.75 inches W
• Mold size: 7 inches L x 4.75 inches W
• Suggested fill weight: about 135 grams (wide), 130 grams (slim)
• 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 both heart 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, billets, or stacked sheet scrap. For a tack fired surface, fill uniformly to about a quarter inch with powder and fine frit.
• 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: LF197 Stringer Hearts Tutorial (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)

Description updated: July 6, 2026

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