Bullseye ThinFire

Bullseye Thinfire is a thin, ceramic-based shelf paper that gives fused glass a smooth bottom and keeps it from sticking to the kiln shelf. It burns off cleanly during firing, leaving a fine powder residue you brush away.

Thinfire gives a smoother, more consistent glass bottom than kiln wash and saves the time of washing and re-coating shelves. It is single-use per firing, so many artists use Thinfire for finished work and kiln wash for general firing.

No. Thinfire is designed for a single firing. It bonds and breaks down during the firing cycle, so you place a fresh sheet on the shelf for each new glass project to get a clean release.

Lay a sheet of Thinfire smooth-side up on a clean, level kiln shelf, then place your glass on top. After firing, lift off the glass and brush away the leftover powder. Always work in a ventilated space and avoid inhaling the dust.

Choose a Thinfire size that covers your kiln shelf or your glass project with a little margin. It cuts easily with scissors, so a larger sheet or roll can be trimmed to fit multiple shelf sizes.