A-A-177C
D. Paper and Binding:
1. The paper stock shall meet the requirements of table 1 when tested in accordance with paragraph 4.C. (3).
TABLE 1
|
Characteristics |
Requirement |
|
Bursting strength |
9 points, minimum |
|
Basis weight – 500 |
12.70 kg + 5 percent |
|
(60.50 cm x 96.52 cm) |
(28 lbs, + 5 percent |
|
(25 in x 38 in) |
|
|
Tearing resistance (average grams each direction) |
18 minimum |
|
Opacity |
80 percent minimum |
|
Brightness |
75 percent minimum |
2. The binding, coverboard, and cover shall be in accordance with good commercial practice.
3. The type of binding shall be either Smith-sewn, side-sewn, press pasted or adhesive or perforation-notch adhesive. For the purpose of this document, press pasted adhesive binding shall mean that adjacent pages of each signature are bonded together using a flexible, durable adhesive and that signature spines are not cut off. The gathered signatures shall also be joined using a flexible, durable adhesive. The adhesive shall be one such that bonded areas cannot be separated without causing damage to those areas. For the purpose of this document, perforation-notch adhesive binding shall mean that the pages in each signature are bonded together using a flexible, durable adhesive which has been applied through special press perforation in the backbone of the signature. In perforation-notch binding, a small amount of paper is removed from the signature spines in the binding process.
E. Bleaching: To obtain an acceptable brightness, a chemical bleaching process may be used. When specified in the ordering data (See Section 6), the bleaching process shall not include the use of
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