[Illustration: FILING THE LETTERS AFTER ENAMELING.]
This is done by girls, who, with very fine files, rub off the edges
and any protuberances which may be there. Every letter is subject to
this operation, and all are turned out smooth and well finished.
Sometimes the letters are colored or further defined by the addition
of a line, but the essentials are as we have already described.
[Illustration: MIXING THE ENAMEL]