Hardcover book production tips

Nanjing Aide Printing Co., Ltd. mainly provides services for the Chinese Christian Association. It is famous for producing luxury hardcover books, including (Bible, "Ci Hai", "Sun Tzu's Art of War" and "Modern Chinese Dictionary", etc. The author of this book, Nanjing Aide Printing Co., Ltd., has been engaged in hardcover production management for many years, and now he talks about his own opinions about the actual technical problems that often occur during production.

Correct understanding of paper webs

Filament is the arrangement direction of the paper fibers formed during the paper production process. When the direction of the silk defect is parallel to the spine, it is a smooth thread, and vice versa. Correct understanding of the paper thread is a very special prerequisite for binding a good book. This feature of paper is also extremely important in two-color overprinting. The internal stress caused by calendering or pulling during the paper production process makes the problem of the silk defects of the paper more complicated. This should be fully realized during the design and use.

1. During hardcover processing, all paper materials, including the text, should be used in accordance with the requirements of the sliver. This can effectively avoid the uneven wave from the book block, the appearance of wrinkles in the ring lining, the book block cannot be leveled and the book spine can be used during the reading. Reduced life expectancy and other issues.

2. When the lining is lining, the glue is often applied to the gauze. Excessive moisture is absorbed by the lining and will cause the fiber to change (because the paper absorbs or loses water, the paper fiber will change in the radial direction), and the vertical change Small, so that the ring liner extends in the radial direction of the fiber. If it is smooth, then the stretched part will be offset in the pressure groove process, and the final performance will be smooth and flat, and vice versa.

3. When folded: If the crease direction is perpendicular to the fiber direction (inverse silk fold), the crease is not flat, and the fibers are easily broken, which is the main reason for the reduced service life of the books and the unfairness of the book block.

Use adhesives rationally

Different adhesives have fundamentally different moisture content and properties and will have different effects on the materials that need to be bonded.

1. When the lining is made of cardboard, the book cover and the PVC cover must use different adhesives.

2. When the back of the book is glued, it is necessary to consider the change of seasons to the film.

3. The drying temperature is well controlled. When the temperature is too low, the adhesive layer is insufficient to dry. When the temperature is too high, the ink is liable to melt and the book block paper is stuck.

4. For coated paper and full-size printed matter, the danger of water evaporating too quickly is extremely harmful, resulting in cracking at the end of the round.

5. In the case of wireless hardcover, the affinity of the first cold glue to be used and the second hot melt adhesive should be considered.

6. Never leave the adhesive open overnight. After the work is over, the machine must be cleaned and the lid of the plastic container must be covered at all times. Hot melt adhesive and bone glue must not be heated repeatedly for a long time or many times, otherwise the viscosity and adhesive force will be significantly reduced and carbonization will be accompanied.

Specification folding standard

1. When folding, the size of the book (original paper or printed sheet) of the same book should be as standard as possible. Excessive deviation will affect the regulation and accuracy of folding.

2. After folding, the size of the signature or color insert must be the same, otherwise it is not conducive to the work of matching pages and sewing lines. In particular, the length of the inner and outer posts must be the same when using the nesting process. Otherwise, there will be inconsistency and quality problems. Also check that the folded pages have the same signature. Consistent, and with a small margin of deviation (5 ~ 8mm), this can not only improve the efficiency of the lock line, but also prevent the phenomenon of page breaks and so on.

3. When breaking the flaps, it is necessary to consider the exhaust during the baling so as to avoid the “eight” wrinkling and to consider the firmness of the connection points to facilitate the subsequent processes.

4. The folded posters should be tied in time with hardwood mats to eliminate the air in the pages and eliminate the paper stress caused by folding.

5. According to paper type. The number of foldings is adjusted correspondingly to the size of the opening and the number of openings of the disk knife used in the breaking, among which the size of the opening is crucial.

Good placards and labels

When you make a make-up, you must do a good job with the label and mark. The placard mark is the logo marked with the abbreviation of the book name and the Chinese small-letter signature. The mark is an identification block that is convenient for checking the accuracy of folding and identifying how many placards are to be identified in the subsequent processing. In the production of highly confusing varieties (in different language versions) or sets of books, placard marks and signatures will effectively help the stapling operator identify. In addition, changing the length and position of the signature will effectively prevent misprints. The following points are noted for the proper labeling and labeling:

1. When making such marks, they should be as small as possible (generally less than or equal to 2mm) in order to prevent these auxiliary signs from being seen in the book.

2. In order to prevent the liner lining down and the inverted version of the book, you can seal it in the ring lining. Seals are printed with pale symbols or "front ring" and "rear ring" to reduce errors.

3. Right before. After the ring lining can not be interchanged or can not be mistaken in the direction of the product, after the ring lining cutting can be painted in the sky and the feet of different colors to distinguish.

4. When using full-printed ring liners, 3mm wide blanks must be left at the sticky points to effectively increase the bond strength.

5. Paste the ring lining 1mm away from the spine so that the ring lining is not broken when the thread is locked. In any case, the ring lining should remain the same size as the front and back signatures.

6. If glue binding is used, the amount of milling at the finish must be kept to ensure that the ring liner is not milled.

Book shell making skills

1. The production of book shells and book blocks is synchronized. The size of the book case must be determined in accordance with the sample book, and the production and mass production of the sample book are conducted in different environments. Therefore, it is necessary to ensure that the size of the sample book is consistent with that of the batch product. More attention is required when producing thick books. The production volume of the book case should be consistent with the order, and the number of pages should also be considered.

2. The cardboard used in the book case shall be cut with a disc cutter. The angle of the flat blade will cause the cardboard to leave a gargle and cause the book envelope to be undone.

3. Two shell-making steps are required to make the face book envelope. Bond the middle diameter with the cardboard first, and then press a 5mm wide and 0.3mm deep gravure at the edge of the joint, and finally paste the cover. To ensure that the junction is smooth and accurate.

4. When printing the shell cover, in order to effectively check the accuracy of the printing rules, a 1 mm wide bleeding wire piece can be added to the outer edge of the cover mid-seam position when the plate is made, so as to check the position deviation of the fabric before the shell is made. The book shell needs to be shaped before the hardcover line in order to eliminate the stress caused by the shrinkage of the bone glue after drying, which helps to prevent warping of the book case.

5. Before the shell is sealed on the shell, it is necessary to pre-heat the middle seam to better match the book back.

Avoid first and last page breaks

In the course of using the hardcover book, the first page with the head and tail ring lining is easily broken, especially the thin book of the book block paper. The solution is as follows:

1. With the consent of the client, will be the first. Switch to thicker paper on the tail.

2. Double ring lining. The use of a sheet of eight-sided sheet as the headband and tailband lining for binding, of course, inevitably locks the thread on the ring lining, and therefore needs to take into account the customer's design requirements.

3. Using sewing process. Will be the first. The tails are separated from the middle and are separated from the first half (first post). After the last half of the post (tail), 2mm is used to sew with the sewing machine, and then the first and last ring linings are affixed to avoid breaking of the first and last pages.

4. Spine paper is used. After the first and last ring linings are affixed, 20mm of spine paper is wrapped around the root of the ring lining, and the 3mm is wrapped in the inside of the signature. In addition, the backfilling process can be completed on SB6000 provided by SIGLOCH. The role of spine paper is to strengthen the bond strength between the ring lining and the book block, strengthen the strength of the ring lining at the book slot (hinge effect), and make the spine firm, which plays an important role in successfully making a good book.

Book block pressed

The compression of the book block is an important part of the book block handling, which can eliminate stress, close the pinhole, and make the back of the book flat and rectangular, especially the compression at the root of the book block. In addition, the folding core of the folded product must also be compacted, which helps to avoid stepping after the book is finished. It is particularly difficult to compress a thin paper book with less than or equal to 16 pages per sheet. It is recommended to use the nesting process or use a cross-locking method.