Cut-line, the tracing (containing the lead lines only) by which the work is cut and glazed.
Flux, the solvent which assists the melting of the metallic pigments in the kiln. Various materials are used, e.g. silica and lead, but unfortunately borax also is used, and I would warn the student to buy no pigment without a guarantee from the manufacturer that it does not contain this tempting but very dangerous and unstable ingredient. (See p. 112).
Form, the sheet of "continuous cartridge" or cartoon paper on which the dimensions, &c., are marked out for drawing the cartoon.
Gauge, (1) the shaped piece of paper by which the diamond is guided in cutting; (2) the standard of size and shape in any piece of repeated work (as quarry-glazing).
Grisaille (from Fr. gris, grey), work where a pattern, generally geometrical, in narrow coloured bands, is superimposed on a background of whitish, grey, or greenish glass diapered with painted work in outline or slight shading.
Groseing, the biting away the edge of the glass with pliers to make it fit. With regard to this word and to the term "calm," I have never found any one who could give a reason for the name or an authority as to its spelling, the various spellings
suggested for the latter word including Karm, Calm, Carm, Kaim, and even Qualm! But while writing this book I in lucky hour consulted the treatise of Theophilus, and was delighted to find both words. The term he applies to the leads is "Calamus" (a reed), while his term for what we should call pliers is "Grosarium ferrum" (groseing iron). So that this question is set at rest for ever. Glaziers must henceforth accept the classic spellings "Calm" and "Groseing," and one may suppose they will be proud to learn that these everyday terms of their craft have been in use for 900 years, and are older than Westminster Abbey.
Lath, the ruler, 3 to 8 feet long, and marked with inches, &c., used in setting out the "forms."
Lathykin, doubtless old English "a little lath," described p. 137.
Lasting-nails, described p. 141.