Paperback book core quality requirements and inspection methods

Quality requirements and test methods for post-press finishing
Quality requirements and test methods for paper-cover bookblocks

CY/T7.2-91

The Press and Publication Administration of the People's Republic of China 1995-07-01 Approved 1991-10-01 Implementation 1 Subject Content This standard specifies the requirements and test methods for the connection quality of book pages, book posts and book posts in the paperback book core.
2 Quoting standard GB 9851 printing technology terms GB 788 books and magazines format and format size 3 Category 3.1 wire binding;
3.2 sewing set;
3.3 lock stitches;
3.4 Adhesive binding.
4 Quality requirements 4.1 Pages and signatures 4.1.1 The layout of the pages is accurate. The pages are free of oil, dead folds, chamfers, white pages, small pages and scraps.
4.1.2 The page number and layout of the signatures are correct. The line numbers of the associated signatures are neat. The error of the position of the page number between the two pages does not exceed 5 mm. The range of the core page position of the whole book does not exceed 8 mm.
4.1.3 The cut-outs of the glue binding booklet are arranged correctly, all on the last crease line, and the penetration adhesive is appropriate.
4.1.4 The size tolerance of the illustration on the book block is 2 mm. For other requirements, see 4.1.2.
4.1.5 Coherent loose-leaf pages and illustrations of the book block shall not be sticky, sticky, and firm.
4.1.6 Viscosity requirements are shown in Table 1.
Table 1 mm Laminating method Sheets Sticky ring Linings Sticky iron wire binding 4-7 Covering the stitches Sewing stitches 4-8 Covering the hooks Locking thread 3-5 Pre-adhesives Indent creases 2 mm, rear Adhesive and Fold Alignment Glue Stapling 3-5 Relax 1 mm wide by milling back width.
4.2 Book Block Binding 4.2.1 Wire Binding 4.2.1.1 The distance set for wire binding is 3/5 of the length of the book block. The distance between the saw and the spine (based on 52 grams of relief paper) is: 3 to 6 mm below 80 pages and 4 to 7 mm above 80 pages.
4.2.1.2 No bad saws, no missing or reordering, and the feet are firm and flat.
4.2.1.3 According to the paper and book block thickness, use different specifications of iron wire, 52 g letter paper prevail, the wire diameter used in Table 2.
Table 2 mm Books Pages 40 Pages following 41-80 pages 81-120 pages 120 pages above the wire straight through 0.50-0.55 0.55-0.61 0.61-0.71 0.71-0.84
4.2.1.4 When the book block is an offset paper and a coated paper, the wire diameter should be appropriately increased.
4.2.2 The quality requirements for the bookbinding staples are given in CY/T 7.5.
4.2.3 Sewing provisions 4.2.3.1 The distance between the order line and the spine is: 100 pages or less, 4 to 6 mm; 100 pages or more, 5 to 8 mm.
4.2.3.2 Number of needles: 16 open book blocks, 17±2 needles; 32 open book cores, 12±2 needles; 64 open book cores, 7±2 needles. Below 16 pages, the needle pitch is 3-4 mm.
4.2.3.3 Orderline is straight, no needles are leaked, sleeves are ejected, excised and broken, and no more than 1 needle is broken. The skew of the order is less than 2 mm and the empty needles are less than 15 mm each.
4.2.3.4 The upper and lower threads of the set key are symmetrically locked without coils.
4.2.4 The quality requirements for glue-bound book blocks are given in CY/T 7.4.
5 Inspection Method 5.1 The measurement method uses millimeters to check only the page number, sticky mouth, order, and staple distance.
5.2 Visual inspection method:
The professional and technical personnel visually inspect and inspect the product quality according to the standard requirements.
Additional information:
This standard was proposed and managed by the Press and Publication Administration of the People's Republic of China.
This standard is drafted by the Chinese printing company.
Drafters of this standard are Wang Huaizhu and Shi Qunfang.