Tropical Fish

The Tropical Fish mold from Colour de Verre casts four assorted fish designs in a single firing. The four cavities produce a mix of different fish shapes so each batch yields a variety of pieces. The larger fish cavities require 32 to 36 grams of frit each, while the smaller fish cavities use 12 to 15 grams each. The mold measures 8.25 inches long by 4.75 inches wide by 1 inch deep, making it a practical option for producing jewelry pendants, sun catchers, or themed decorative accents.

Like all Colour de Verre ceramic casting molds, this one is reusable across many firings when prepped and cared for properly. Load each cavity with frit in your chosen colors, fire to the target temperature, and the glass takes the fish shape of its cavity. The mold is COE agnostic, so it works with COE 96, COE 90, or other fusible glass as long as you match the firing schedule to the glass you use.

What does the Tropical Fish mold make?
It casts four assorted fish shapes in one firing. The cavities include both larger and smaller fish designs, so each batch yields a variety of pieces suited to jewelry pendants, sun catchers, or decorative accents.

How much frit do I need per cavity?
Colour de Verre lists 32 to 36 grams for the larger fish cavities and 12 to 15 grams for the smaller ones. Weigh your frit and test a first run when the result matters, since fill weight can vary with how you pack each cavity.

What COE glass can I use in this mold?
Any COE. Ceramic casting molds are COE agnostic, so the same mold works with COE 96, COE 90, or other fusible glass. Match your firing schedule and anneal soak to the specific glass you are using.

How do I prep the mold before each firing?
Colour de Verre requires priming the cavities before every firing. Use ZYP BN Lubricoat or Hotline Primo Primer and let it dry fully before adding frit.

Specifications

• SKU: 181654
• Manufacturer: Colour de Verre
• Makes: 4 assorted fish (larger and smaller designs per firing)
• Mold size: 8.25 inches L x 4.75 inches W x 1 inch deep
• Suggested fill weight: 32 to 36 grams per cavity (larger fish), 12 to 15 grams per cavity (smaller fish)
• Material: ceramic kiln casting mold, reusable
• Glass: any COE (COE agnostic)
• Suggested uses: jewelry pendants, sun catchers, themed decor

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 with a boron nitride mold primer before every firing. Colour de Verre calls for ZYP Boron Nitride Mold Primer or Hotline Primo Primer. Let it dry completely before adding frit so the glass does not stick.
• Fill each cavity with frit in your chosen colors. The larger fish cavities take 32 to 36 grams and the smaller ones take 12 to 15 grams per cavity.
• Ramp no faster than about 350 F (195 C) per hour to avoid thermal shock to both the mold and the glass.
• Fire to no more than about 1450 F (785 C) overall. Colour de Verre suggests a fusing target of 1290 F to 1310 F (700 C to 710 C) for COE 96 glass.
• For COE 90 glass, fire about 25 F (15 C) hotter than the COE 96 target temperature.
• Finish with a controlled cool and an anneal soak suited to your specific glass and its COE.
• Let the kiln cool fully before removing pieces. Re-prime the cavities before the next firing.

Colour de Verre 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 a full production firing.

• Ramp rate: no faster than about 350 F (195 C) per hour
• Fusing target (COE 96): 1290 F to 1310 F (700 C to 710 C)
• Fusing target (COE 90): approximately 25 F (15 C) hotter than the COE 96 target
• Maximum recommended kiln temperature: about 1450 F (785 C)
• Anneal soak: follow the appropriate anneal temperature and hold time for your specific glass COE

Helpful downloads: Priming Molds With ZYP Spray (PDF)

Description updated: July 6, 2026

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