To one familiar with printing practice, however, the different usages of the term are so clearly understood as to avoid confusion. In this machine a band of paper, which is perforated on a keyboard, operates a casting machine by bringing the single matrices in contact in the proper order with a mold, so that the letters are cast one at a time and arranged in lines automatically spaced to the proper length. This machine is in general use for the better class of book and magazine work. Since each letter is cast separately, corrections are made much more easily than on the linotype. Laid paper shows a regular pattern of lines close together in one direction and crossed at right angles at greater intervals in the other.
Wove paper shows the wire marks at uniform distances in both directions.
Coated paper is machine-finish paper which has been coated with clay, used principally for printing halftone engravings. It is made with a dull, semi-dull, or glossy surface according to the amount of calendering to which it is subjected. Eggshell paper presents a fine-grained surface, and is commonly used in book printing where bulkiness is desired. It is much in favor for school textbooks, since it is of a sufficiently smooth surface for halftone printing and yet has a dull finish that is less fatiguing to the eyes than glossy paper. Machine-finish paper is a paper that comes from the machine in a completed condition.