Wafers, are thin circular cakes of paste, employed for sealing letters, and for other purposes.

Wafers are made by mixing the finest wheaten flour, either with the whites of eggs, or with a solution of isinglass, and a small portion of yeast: these ingredients are thoroughly incorporated, and reduced to a proper consistence, by the addition of gum-water. The batter is then spread on tin-plates, or poured in a flat iron form, and placed over a charcoal-fire, where it is speedily baked ; after which it is cut out to different round sizes. The paste may be tinged of any colour; for instance, red with a solution of Brazil-wood, or vermilion ; blue with that of indigo, or verditer ; and yellow with saffron, gamboge, or turmeric.