Franklin Beech, The Dyeing of Woollen Fabrics
“ A successful vat maker is one who closely observes his vats, and the way in which they are working, and who, as the (p. 140) result of such observations, is able to tell in what way his vats are deficient, so that he may know how to supply that deficiency.The following method of setting a woad vat may be adopted. It is calculated for 100 gallons of liquor. The vat is filled with hot water, and 80 lb. of woad are allowed to steep overnight in it, having first been well stirred into the water, so as to ensure that every part is wetted out. The next morning there is added 8 lb. madder, 12 lb. ”
