Page:Paper and Its Uses.djvu/93

Rh illustrations are included, a super-calendered paper, slightly toned, is very suitable. When half-tones of very fine grain are used, it may be necessary to print on art paper throughout, or the illustrations printed on art paper and the body of the work on a printing paper of exactly the same shade as the coated paper. Mixture of shades in books should be avoided as far as possible. The practice of printing sections of magazines on different papers is growing, but is to be deprecated.

For works which have to make bulky volumes for a comparatively few pages, featherweight papers are employed. These in 80 lb. quad crown will usually be chosen, wove or laid as fancy dictates. Some of the wholesale stationers state on the samples the thickness or bulk of a volume of a definite number of pages, this information serving as a guide in selecting paper to produce the thickness required in a volume. When a series of books is issued it is sometimes desired to have all the volumes of equal bulk. This is attained by adopting papers of different thicknesses; thus a book of 500 pages is printed on a paper about half the thickness of that used for a volume of 256 pages. The range of substances in which papers are supplied renders this arrangement comparatively easy.

The large variety of fancy papers for jobbing work calls for little comment. Avoid hard papers for programmes unless there is plenty of time for the ink to dry, or gloves will bear the printer's imprint. For outdoor functions coloured papers, if employed for programmes or similar jobs, must not be affected by moisture. Colour may decorate summer costumes if the programmes printed on coloured paper are sat upon. Art paper, too, is unsuitable for outdoor exposure in our changeable climate, and its use is to be