87. Calico printing from cylinders. Many of the patterns on
printed calicos are copies by printing from copper cylinders
about four or five inches in diameter, on which the desired
pattern has been previously engraved. One portion of the
cylinders is exposed to the ink, whilst an elastic scraper of
very thin steel, by being pressed forcibly against another part,
removes all superfluous ink from the surface previously to its
reaching the cloth. A piece of calico twenty-eight yards in
length rolls through this press, and is printed in four or five
minutes.
88. Printing from perforated sheets of metal, or stencilling.
Very thin brass is sometimes perforated in the form of letters,
usually those of a name; this is placed on any substance which it
is required to mark, and a brush dipped in some paint is passed
over the brass. Those parts which are cut away admit the paint.
and thus a copy of the name appears on the substance below. This
method, which affords rather a coarse copy, is sometimes used for
paper with which rooms are covered, and more especially for the
borders. If a portion be required to match an old pattern, this
is, perhaps the most economical way of producing it.
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