Book paper is the weight of one ream, size 25x38 inches. Note the headings of the columns above. Writing paper, known as Bond paper, is figured on a basis of one ream (500 sheets), size 17x22.

In using this table, it should be remembered that the figures refer to pages, not leaves or sheets. One leaf or sheet represents two pages.

GRAPHIC PRESENTATION

paper is called Folding Coated. Also Coated Offset paper has been developed and when so termed is suitable for the lithographic process.

Writing or Bond paper as differentiated from Book paper indicates a sheet made for hardness, crackle, and strength for letterheads, forms, etc., rather than for printing surface and opacity. In other words, Book paper is a "filled" sheet to secure printing quality and opacity, whereas Bond paper is not "filled" These qualities are not as important as the other requirements desired in Bond Paper.

In the selection of paper, samples of various suitable papers should be obtained from the printer, who best knows the problem and can best advise on the selection. The final appearance of the finished job should be determined by the making of a dummy to demonstrate bulk, opacity, color, strength, etc. Paper sold under the manufacturer's brand implies full value, uniformity, and availability.

A more detailed explanation of the factors in selection of paper may be found in booklets published by various paper companies: S. D. Warren Company , Boston, Mass., "A Workbook for Planning Printing" and "Estimator's Book." HammerTnill Paper Co., Erie, Pennsylvania. Champion Paper & Fibre Co., Hamilton, Ohio. American Writing Paper Co., Holyoke, Mass.