Solve the problem of binding after printing skillfully

The post-press binding process is the final decoration process of the entire process of the printed product and the final completion process of the book processing. It is related to the use value, preservation value and reading value of the printed product, and affects the processing of the two processes before and after printing. Guarantee of effect and cycle. No matter how good the printed matter is, it cannot reflect the value of the printed matter if it is not properly and firmly connected. For a long time, people have always been prejudiced against this process, thinking that anyone can do binding, but neglected its importance. Large-scale printing information society and printing research society generally talk about pre-press, more printing, and less binding. In fact, the quality of books is a systematic project, and problems in any link will affect the final quality. Therefore, we must give full attention to the post-press binding process.

Avoid inappropriate selection

There are many books that do not consider the processing difficulties and effects on the cover material selection, causing various quality problems. In order to improve the book binding effect, the cover thickness of many books differs greatly from the thickness (or weight) of the book block paper, resulting in unequal tension between the two. When the cover is lifted after wireless binding, the first page of the book block is pulled to expose the rubber bottom or Sample pages, causing non-conforming products. This kind of product can solve the problem of leaking glue if you add a gram or a liner with a moderate thickness between the cover and the first page of the book block, but many publishers do not plan to reduce costs at all, nor Consider the processing effect.

As the thickness of the cover becomes larger and larger, 200-gram or more cardboard or paper is designed with a folding front opening process. When the creasing is indented, the crease breaks and leaks, which destroys the appearance quality of the book. In fact, the front cover of the cover of 200 grams or more must be folded, which will make the book binding process very difficult, and the quality cannot be guaranteed.

In addition, the length of the cover is shorter than the length of the book block will also cause dirty books. During book binding processing, most of the cover length is about 7 mm shorter than the length of the book block. As a result, the end of the back of the book is empty when the wireless binding is applied, which causes the back of the book to be exposed, and some dirty books are leaked. If the burrs of the sky and the feet are left in the cover design, this phenomenon can be completely avoided.

Design a reasonable plan

Designing a pattern without leaving room will also cause inability to process. Some American editors did not take into account the difficulties in the binding process when designing the cover with patterns and frames, and did not understand the requirements of the quality standards of the binding. They deliberately pursued the appearance, and the binding was far from the expected effect.

For example, if a processing unit receives a paperback book from a publishing house with a thickness of 12 mm, the back of the book with its cover design is divided into black on all white, and the full version of cover one and cover four is black and white. The cover should not be exposed and the back of the book should not be black. According to the provisions of Articles 3, 4 and 5 of the National "Binding Quality Requirements and Inspection Methods-Paperback": the translation error of the back of the book is based on the centerline of the back of the book, and the finished book with a thickness of less than 10 mm on the back of the book is translated to ≤1.0 mm; for the finished book with a thickness of more than 20 mm and less than or equal to 30 mm, the tolerance for the translation of the back of the book is 2.5 mm; for the finished book with a thickness of more than 30 mm, the tolerance for the translation of the back of the book is 3.0 mm. The tolerance of the skew of the back of the book is smaller than the tolerance of the translation of the back of the book by 0.5 mm. So how can this black and white design have strict requirements on the processor, and how can it achieve the desired effect?

Therefore, publishers should have more contacts and regular communication with the binding and processing units. After fully understanding the overall link of book printing and printing, determine appropriate and reasonable design schemes, so as to make the printed books more sturdy and beautiful.