1. The reasons for influencing the quality of book printing.

This or that quality problem often occurs in the printing and binding of books. Such as printing the quality defects of ink is not well, through printing, paint, ink overprint error, lack of web page, white, short of pen drawing, dirty mark, etc., binding quality defects of inaccurate folding, more than 1, the wrong post page, page number error exceeds bid, even pages, shrinkage, off the page, the page, serious empty back, side back glue dehiscence, hardcover defect performance for locking wire loose, clear steps, no ridge, gone with the wind is differ, such as hole quality defects caused by raw materials performance for paper, paper color serious, damage, etc. The reasons for these problems are various, and the main reasons are as follows.

1) reasons for construction period and cycle.

The bearing unit shall arrange production according to the cycle time required by the publishing house, and arrange the production according to the existing equipment. Because the publisher demanding tighter, printing unit to accept customer's task (type, quantity), small mouth and heavily phenomenon, namely next to eat, not complete in the publishing units required cycle time, enterprise rushing phenomenon is relatively serious, work overtime to catch production, to the time limit for a project time compression, causing the deterioration of publications, the print quality. Because in the books and periodicals printing enterprise business widespread phenomenon of "two seasons, spring and autumn season two production peak, teaching materials, teaching the production task is very heavy, energy is limited, on the general book printing production off-season production production task, can concentrate on pay special attention to the quality of our products and peak production tasks, the production ability is limited, the following can't print, so the enterprise first catch big color to print books, general books tardiness is relatively serious, even reject, is barely next don't seriously, engaged in cursorily, only to catch the timeline, quality awareness and quality control is lax.

2) the equipment is not compatible and the materials are used.

On undertaking task, the specific requirements of the press always have this or that, there are some books and production of printing process requirement is very high, some existing equipment or poor or no printing units, and some are unable to undertake original product, because of hard next, in the business for the process to send their processing is bad outside processing, quality can't get tracking and security, while printing unit to process the quality of the products is also very seriously, but some special technical requirements up quality cannot be guaranteed, make product quality always felt a little overwhelmed. Like some enterprises to print the equipment of the workshop, the environment as a whole is not good, the printing process quality can be guaranteed. Due to price factors, some printing units to use production materials and auxiliary materials, such as PS version, printing ink, rubber, fabric and glue, and so on, cause the printing quality is general, out of the brilliant, poor quality of gum, does a pull is glue when finished product inspection. Add publications printing materials processing, to press allocation of paper, paper to the printing, paper, color difference, problems such as broken also can't check whether anything, cause print finished filling clamp, inky uneven, some problems such as unclear handwriting.

3) reasons for film and sample quality.

The quality of the tablets directly affects the quality of printed matter. The film should be consistent in density, good transparency, no fog, scratches, spots and dirty marks. The layout should be consistent, and the error should not exceed 1mm. The four color film must check whether its gauge line and network line Angle is correct, whether the image is right or wrong. Due to some reprint books or partial modification, revision teaching materials, teaching books were just part of the piece or change to a four color piece, reprint, film density or network, after a book as a whole look ok, but the few pages or a few post printing quality is different, or deep or shallow, inconsistent. After the production of the plate, the color is adjusted again, so that the cost is no longer proofing, causing the printing time or color sequence to be inaccurate or unable to grasp the correct color sample to affect the quality. Especially the digital proofing, because the company in the control software, proofing paper and ink use, printing accuracy is also different, the quality is not the same, the traditional printing is more difficult to grasp.

4) reasons for book binding and layout design.

Binding and layout design must conform to the production process requirements of platoon, printing and loading. Some large area field design and fine pattern design on the same page, because the field adsorption thicker ink printing requirements, under the influence of pressure, easy to cause the ink into small line design, make the dirt and unable to identify. Some characters are designed to be four-color overprint (including anti-white overprint) and dot overprint, which can easily cause overprinting on printing. On the cover, the spine is often designed as a color block and the spine thickness is too tight. When binding the cover, the cover will be moved slightly, and the color will be biased towards the cover or back cover. Some pattern on the text format design across the page design, it is best to design the same on the same page in the printed sheet, will not be stagger when folding, and the text into the background design branch also shoulds not be too big, background too deep affect reading, printing paper also prone to hair, off powder phenomenon. Dot the number is too low, the printing plate is easy to lose, the bottom grain can not print out. The top of a page, page design, decorative thread design also try to avoid bleeding due to the error of the idea of folding, binding after a book, look from the exterior, slit piece lines from top to bottom is uneven, affect beautiful.

2. Countermeasures

Above all, how to ensure the quality of printing and binding the books and publications, each printing unit must strive rectification, to place an order for a practical and effective management measures, to pursue in the merit quality books, the quality is the best reputation and brand printing units. To this end, it is suggested that the following measures be taken.

1) printed sample for press books product, film, printed voucher, production requirements (including process and cycle requirements), review carefully, to the piece of edition, nuclear test version of the book size, volume, design requirements, the spine, tonal and binding sequence and end paper inserts, preface, copyright page, and so on. Have not clear or have an oversight to contact partners (printed and editor), understanding to carry out the clear in place, timely communication with publishing units, in order to obtain cooperation and support in terms of quality, such as raw material quality assurance and coordination with the materials department.

2) when the task is busy, the undertaking unit should act according to the capacity of the task, and not be able to take back the products that cannot guarantee the quality of the process. Should consider its own actual situation, under the condition of guarantee quality, cycle, meet what kind of calendar, do the cycle management of printing process and binding process cycle management, timely grasp to sample, to slice, incoming situation, completes the scheduling coordination, ensure the production process smoothly.

3) to encourage enterprises to actively promote the use of new technology, new technology and new materials, technology upgrading equipment and practitioners to strengthen the training work, combine the accountability system for product quality and economic, to strengthen the process quality control, establish an effective quality inspection system, strengthening the management of product and to do a good job of product quality.

4) press management departments should further adopt quality incentives, -- -- for each printing unit carries on books, excellent books in species number has a proper proportion, to award up to standard, can not meet the standard of penalty. Strengthen the production scheduling, reasonably stipulate the printing cycle, "qi, qing, ding" will publish the printing parts handover. Organize the frame design, edit the staff to visit and learn the printing process, and make clear the selection of printing process.

5) to strengthen send signed sample and SongPing copies (qc) work, must first after printing units in books and binding to send signed sample put in storage after delivery, rework again after found the problem, cause the editorial department and press visa copy. Reach the standard assessment books printed sheet may be missing, missing delivery, shall not carry out, on the quality can not meet the inspection criteria for not to send, how's the quality, the comparison results have a look, to the enterprise business to focus on quality, cycle is well done.