[X.]
XANTHINE, is the name given by Kuhlmann to the yellow dyeing-matter contained in madder.
[Y.]
YEAST, is the froth of fermenting worts. See [Beer] and [Fermentation].
YELLOW DYE. (Teinture jaune, Fr.; Gelbfarben, Germ.) [Annotto], dyer’s-broom (Genista tinctoria), [fustic], [fustet], [Persian] or [French berries], [quercitron] bark, saw-wort (Serratula tinctoria), [turmeric], [weld], and willow leaves, are the principal yellow dyes of the vegetable kingdom; [chromate of lead], iron-oxide, [nitric acid] (for silk), sulphuret of antimony, and sulphuret of arsenic, are those of the mineral kingdom. Under these articles, as also under [Calico-printing], [Dyeing], and [Mordants], ample instructions will be found for communicating this colour to textile and other fibrous substances. Alumina and oxide of tin are the most approved bases of the above vegetable dyes. A nankin dye may be given with [bablah], especially to cotton oiled preparatory to the Turkey-red process. See [Madder].
YELLOW, KING’S, is a poisonous yellow pigment. See [Arsenic] and [Orpiment].
YTTRIA, is a rare earth, extracted from the minerals gadolinite and yttrotantalite, being an oxide of the metal yttrium.