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PAPER AND ITS USES

**To find the Quantity of Paper required for an Edition of a Book of a Given Size.**—An edition of a book of 400 pages demy octavo, 6,500 pages, is required. What quantity of double demy should be issued in perfect reams? A sheet of double demy will contain 32 pages; a ream will produce 500 copies.

Therefore, 6,500 x 40032 x 500 = 162½ reams.

Or, 400 ÷ 32 = 12½ sheets per copy; 6,500 = 13 reams;

13 x 12½ = 162½ reams.

**To Calculate the Weight of a Ream Containing a Larger or Smaller Number of Sheets.**—Multiply the weight by the factor given below, or else add or subtract the fraction representing the difference in the number of sheets.

Table of Factors

Table of Factors. | Table of Fractions.^{[1]} |
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To convert to |
480 | 500 | 504 | 516 | 480 | 500 | 504 | 516 |

480 | ... | 1.042 | 1.05 | 1.075 | ... | + 124 | + 120 | + 340 |

500 | .96 | ... | 1.01 | 1.032 | – 125 | ... | + 1125 | + 4125 |

504 | .95 | .992 | ... | 1.022 | – 121 | – 1126 | ... | + 142 |

516 | .93 | .969 | .977 | ... | – 343 | – 4129 | – 143 | ... |

- ↑ Add or subtract the fraction of the weight of the ream as shown.