What does frit mean?
A frit is a vitreous material that has been melted, cooled, and ground into granules or powder, serving as a key raw ingredient in glassmaking, ceramics, and enamelling. Potters and glaze chemists rely on frits because they are stable, soluble components rendered inert by pre-fusing: a mixture of silica and fluxes is melted together, quenched into a glassy solid, and then milled, producing a material that melts predictably at kiln temperatures without the hazards of handling raw soluble fluxes. In studio glasswork, frit usually means crushed glass available in fine, medium, and coarse grades, scattered over hot glass to add colour and texture. The word carries a technical, workshop register — you will meet it in a pottery supply catalogue far sooner than in casual speech. Its origin is delightfully literal: English borrowed it in the seventeenth century from Italian 'vetro fritto', meaning 'fried glass', a nod to the frying-like process by which the raw batch was melted down. For anyone interested in how glazes get their colour or how kiln artists build up layers, 'frit' is the vocabulary word that unlocks the craft.
Granulated vitreous material produced by melting and rapidly cooling a mixture of sand and fluxes, then grinding it; used as an ingredient in glazes, enamels, and glass.
"Add the frit slowly to the glaze slurry while sieving to avoid lumps."
In commercial ceramics, 'frit' denotes industrially prepared, pre-fused glaze materials; among art-glass practitioners it more often refers to crushed coloured glass.
To fuse a raw glass batch into a frit by heating and then quenching and grinding it.
"The workshop frits its own batches to keep lead out of the raw glaze materials."
Regular plural; used when referring to different grades or types of frit, e.g. various commercial frits for glazes.
"The supplier stocks dozens of frits, each with a different melting range."
Before it ever touches a kiln, 'frit' literally means fried — the word descends from an Italian phrase for 'fried glass.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of frit
The English word 'frit' entered use in the early seventeenth century, borrowed from Italian 'vetro fritto', meaning 'fried glass' — a reference to the process of melting a raw batch of sand and flux until it fuses. The Italian term itself traces back to Latin 'frigere', meaning 'to fry', the same root that gives English 'fry'. Cognates sharing this root include 'fritter' (via 'frictura', 'a frying') and 'fricassee', reflecting the culinary lineage embedded in this glassmaker's term.
How frit is actually used
Register: technical/specialist — found mainly in ceramics, glassmaking, and industrial contexts rather than everyday conversation. In ceramics studios, 'frit' often refers specifically to commercially prepared glaze materials sold by suppliers, while in art-glass work it commonly means crushed glass sold in graded particle sizes (fine, medium, coarse).
Easily confused with frit
A fret is either a small ridge on a guitar fingerboard or a state of worry, whereas frit is granulated glassy material; the words look similar but share no meaning.