BOILING, in trade and manufactures, is a preparation given to divers sorts of bodies by making them pass over the fire, chiefly in water, tho' sometimes in other liquors. In this sense we speak of the boiling of salt, boiling of sugar, copperas, &c.
BOILING of Silk with Soap is the first preparation in order to dyeing it. Thread is also boiled in a strong lixivium of ashes to prepare it for dyeing.