The letters are now taken charge of by a girl, who lays them out on a
wire tray, the hollow side up, and paints them over with a thin
mordant. While they are in this position, and before the mordant
dries, they are taken on the gridiron-like tray to a kind of large
box, which is full of the powdered enamel, and, holding the tray in
her left hand, the girl takes a fine sieve full of the powder and
dusts it over the letter, all superfluous powder falling through the
open wirework and into the bin again, so that there is absolutely no
waste.
[Illustration: DUSTING THE LETTERS BEFORE FIRING.]