V.—Valonia, [35]. Acorn cups of certain species of oak from S. Europe, containing 25-35% of tannic acid.
Vegetable alkali. Potash.
Verdigris, [33]. Acetate of copper.
Vitrum, [76].
W.—Walnut, [43], [127], [132].
Water for dyeing, [23].
Weld, [107-112], [120], [130], [134], [135].
Wet out, to. To damp, before putting the yarn or cloth into the dye.