For couching gold, a very fine twisted silk does well. Purse silk, thick and twisted, lends itself perfectly to basket work. Working in coloured silks, one should take advantage of the quality of pure transparent colour which silk takes in the dyeing. The palette of the embroiderer in silk is superlatively rich.
The purest gold is generally made on a foundation of red silk. Japanese gold does not tarnish so readily as "passing," which is in some respects superior to it. For stitching through, there is a finer thread, called "tambour." Flat gold wire is known by the name of "plate," and various twisted threads by the name of "purl."