Has, since the introduction of enamelled or polished cards, made rapid strides toward perfection; the fine absorbing quality of the enamel, under proper management, producing the most beautiful results,—in many cases scarcely discernible from copperplate. A card, to be well printed, requires as careful treatment as a wood engraving, (see p. 280,) so far as making ready is concerned, and in working without blankets and using the finest ink. Having made a light impression on the tympan-sheet, place the pins so as to bring the impression as nearly as possible in the centre of the card, one pin at the lower side and two at the off side, taking care that the head of the pin does not come in contact with the types. The impression should be exceedingly light until properly regulated,—at no time more than is actually necessary to bring up the _face_ of the type. Cards are now mostly printed on small card-machines, at the rate of one, two, and even ten thousand per hour. All cards should be printed dry. A small quantity of varnish put on the rollers and well distributed will prevent the enamel from peeling. The addition of a little ultramarine blue will beautifully intensify the black ink used in printing enamelled cards. The patent extension feed guides, or tympan gauge pins, shown on page 310, will be found very convenient and useful. GOLD PRINTING. The types being made ready for press in the usual manner, the surface is covered in the ordinary way with gold size instead of ink, and the impression taken upon the paper. For a large job, remove only the back from a book of leaf-gold; for a small one, lay a straight edge across the book, and cut it through, of the size required, with the point of a sharp penknife. This must be done before using the size. Slightly wet the end of the forefinger of the right hand, and, placing the thumb of that hand on the pile of gold, raise the edge of the paper with the forefinger sufficiently to dampen it with the moisture of that finger; then press the moistened edge of the paper on the gold, and it will adhere sufficiently to enable the fingers to lift gold and paper together and place it on the impression. Proceed thus until the size is entirely covered; gently pat the gold with the balls of the fingers, or any soft, pliable substance, until it is set; then, with a very soft hat-brush, remove the superfluous gold, when a clear and beautiful impression will appear. Its sharpness will depend on the judgment of the printer in applying the size to the type. BRONZE PRINTING