COE90 Frit

COE90 frit is Bullseye-compatible fusing glass sold in powder, fine, medium, and coarse grain forms for adding color, texture, and accents to fused work. This category at Art Glass Supplies brings together Bullseye Glass Company and G. A. G. frit across opalescent, transparent, tint, streaky, and iridescent colors, along with pre-mixed frit blends, color-matched frit balls, and CBS dichroic frit for sparkle accents.

What COE90 frit is

Frit is glass sold as granules or powder for controlled placement in kilnformed work. COE90 means it carries a coefficient of expansion of 90, so it is intended for use with tested-compatible COE90 sheet, stringer, rod, and powder from the same family. Grain sizes generally run from powder for shading and detail, through fine and medium for even color washes, up to coarse for visible granular texture in the finished piece.

What's in this category at AGS

The selection is led by Bullseye Glass Company and G. A. G. across the standard opalescent and transparent palettes, including tint frits and streaky pairings. Browse COE90 opalescent frit for solid, light-blocking color; COE90 transparent frit for stained-glass clarity and tints; COE90 streaky frit for two-tone granules; COE90 frit blends for pre-coordinated palettes like Alpine Meadow and Autumn Sunset; COE90 frit balls for round, jewel-like accents that hold their shape; and COE90 dichroic frit from CBS for color-shifting highlights. Assorted Bullseye sampler packs are also stocked if you want to try a range of colors at once.

Choosing the right frit for your project

Opalescent frit reads as saturated, opaque color over light and dark backgrounds. Transparent frit lets light pass through, deepens when layered, and pairs cleanly with clear base sheet. Streaky frit carries more than one color into each granule, which is useful for organic landscapes, skies, and water. Dichroic frit reflects different colors at different viewing angles and is typically used as a small-quantity sparkle layer rather than a base. Frit balls keep their round form through a full fuse for distinct dots, and pre-mixed blends save mixing time when you want a coordinated look out of one jar.

Firing and using COE90 frit

Keep every component in the COE90 family for any piece that fires together. Frit works for pate de verre and frit casting in molds, sifting onto a base sheet for color washes, line drawing with powder, dot and inclusion accents, and surface texture on a cap layer. Powder and fine grains melt into smoother surfaces; coarse grain holds individual granule shape if fired short of a full fuse. Keep frit clean and dry before firing to limit devitrification, and match your firing schedule to the layer thickness and effect you want.