GOLD SIZE, for burnished gilding, is prepared of one pound and a half of pipe clay, half an ounce of red chalk, a quarter of an ounce of black lead, forty drops of sweet oil, and three drams of pure tallow. The clay, chalk, and black lead are to be ground very fine, separately, in water, then mixed together; the oil and tallow are next added, and the mixture is ground to a due consistence.
GOLD THREAD is formed of flattened gold wire wrapped closely over a thread of yellow silk, by means of a wheel and iron bobbins.
GOLD WIRE is made by taking a cylindrical ingot of silver which has been superficially coated with gold, and drawing it successively through a series of holes in a hardened steel plate, each of which is a degree smaller than the preceding hole, and proceeding thus until the requisite degree of fine-
Gold Coastness is attained. It may be observed that in this process, however fine be the wire, its gilded surface exhibits no flaw even when viewed by the microscope. Flattened gold wire is the same wire after it has been passed between rollers of polished steel.