[f. FRIT sb.2] trans. To make into frit; to fuse partially; to calcine. Hence Fritted ppl. a., Fritting vbl. sb.; also attrib.
1805–17. R. Jameson, Char. Min. (ed. 3), 295. Fritting, when single parts of the mass are melted, while others remain unaltered.
1832. G. R. Porter, Porcelain & Gl., vi. 199. The sand, lime, soda, and manganese, being properly intermingled, are fritted in small furnaces.
1853. Ure, Dict. Arts, I. 908. When the fourth hour has expired the fritting operation is finished.
1879. Rutley, Study Rocks, xiv. 291. Porcelain jasper has a fused or fritted appearance, a slight gloss, and the different bands or laminæ often assume strongly-marked differences of colour, in which dark green and brick-red sometimes predominate.
1881. Raymond, Mining Gloss., Fritting. The formation of a slag by heat with but incipient fusion.
1881. Harper’s Mag., Feb., 364. These … are fritted or melted in an oven till they run like molasses.
