How to Cast Glass Frit - 3D Glass - Go Fusing Blog
glass castglass castingHaik BrushKiln Postmold cleaningMold Cleaning Brushmold prepPrimo Primer

How to Cast Glass Frit - 3D Glass

June 9, 2018
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Glass Casting Tips and Tricks

Tools and Equipment

  • Glass Casting Molds
    • Kiln & Kiln Posts (#41630)
    • Different size spoons
    (we used measuring spoons)
    • Primo Primer (#41515)
    • Primer applicator haik brush (#41601)
    • Diamond Polishing pads (#41612)
    • Small Paint Brushes
    • Mold Cleaning Brush (#41600)

    1. Prepare Mold Glass Casting Molds Apply 3 to 4 thin coats of Primo Primer Primo Primer (#41515) on the mold using brush Primer applicator haik brush (#41601). Use a blow dryer to dry between coats or air dry. Each coat should be dry before the next coat is applied.

    Note: Re-apply primer after each firing. Use a stiff bristle brush Mold Cleaning Brush (#41600) to remove spent primer.

    2. Fill Mold Fill mold with frit until the frit is mounded above the mold.
    Note: You can add any of our small precut glass shapes but we recommend that you position them in the bottom of the mold before you add frit.

    3. Final Preparation for Firing Use a brush to tuck frit down on the sides of the mold before fusing. This keeps the frit from sticking to the sides of the mold while fusing.

    4. Fuse
    Place mold on kiln posts in kiln; this will ensure an even flow of heat around the entire mold. Fuse using the firing schedule below:

    Note: Let the kiln sit unopened until the next day. This will give your project plenty of time to anneal back to room temperature.
    SMALL GLASS CASTING FIRING SCHEDULE
    Process Temp/Min Desired Temp Soak Temp Action
    Increase/Temp 250°F/121°C 300°F / 149°C 10 Min. Hold Fire
    Increase/Temp 400°F/204°C 1,465°F / 796°C 10 Min. Hold Fire
    Cool/Temp As fast as possible 950°F / 510°C 60 min. Hold Fire
    Cool/Temp 100°F/38°C 800°F / 427°C 15 Min. Hold Fire
    Cool/Temp Do Nothing 100°F / 38°C N/A DO NOT LOOK


    Note: Let the kiln sit unopened until the next day. This will give your project plenty of time to anneal back to room temperature.

    5. Clean Up

    Use diamond pad or grinding stone to knock off and smooth and sharp points. Fire polish if necessary.

    Glass Casting Mold Glass Casting Mold