Post press processing of the hottest digital print

Digital printing integrated post press processing

integrated post press processing solution

the quality and speed of digital printing make it more attractive and become one of the increasingly widely used printing methods. Almost all digital printing products need post press binding processing to become practical printing products, and most post press processing processes can be applied to post press processing of digital printing

at present, the main post press processing equipment of digital printing includes folding machine, double loop binding machine, plastic loop binding machine, wireless adhesive binding machine, horse riding stapler and page matching machine. Among them, folding machine, wireless adhesive binding machine and riding stapler can be divided into floor type and desktop type, but usually riding stapler is floor type. There are two types of page dispensers, vertical and horizontal, most of which are vertical

it should be clearly pointed out that not all printers or post press processors can control the post press processing of digital printing. If the enterprise has rich knowledge of digital printing, understands the particularity of digital printing, has a variety of post press processing equipment, has strong production and processing capacity and rich post press processing experience, then post press processing of digital printing is no longer a difficult work

a few years ago, digital printing was still a new thing, which was far from commercial production. There was a big gap between the quality of digital printing and people's requirements, and the production efficiency was also very low, which was difficult to meet people's needs

however, in recent years, the speed of the change and development of digital printing has completely exceeded people's imagination. Today, the production efficiency of digital printing has been greatly improved, and the range of printing materials is becoming wider and wider. The printing quality and effect of some printed materials have to be amazing. Digital printing has indeed become the most attractive way of printing

however, from the perspective of bookbinding and post press processing, there are still some problems that cannot be ignored in the post press processing of digital printing. This paper attempts to explore the post press processing mode of digital printing, in order to provide some references for readers

consider post press processing from prepress design

prepress design will contribute to the successful completion of digital printing post press processing. In digital printing, the quality of prepress design has a great impact on the cost of post press processing. Because the paper specifications used in digital printing are limited, and a large number of digital prints are printed on one side, in addition to the prepress design of digital printing to strive to make the most effective use of paper, the following factors should also be considered

the closed-loop automatic control system with negative feedback makes the deformation rate stable at the preset value

1 Paper thread direction

if allowed, try to make the thread direction of the paper consistent with the back direction of the finished book. Due to the particularity of the combination of the pigment on the surface of digital printing paper and the paper, if the page is folded in the horizontal thread direction, the image is easy to break at the page under the condition of folding 1.1 strictly abiding by the transportation, storage, device and application rules of the experimental machine. Therefore, the pre press design of digital printing should take into account the post press processing technology

2. Image position on the print sheet

usually, many digital prints design the image in the middle of the print sheet, but when post printing processing is carried out after printing, it is found that doing so wastes a lot of time and money. For example, if an image with a size of 6 inches and 9 inches is designed in the middle of a print with a size of 8.5 inches and 11 inches, the four sides of the print need to be cut when cutting; However, if the image is placed on a corner (such as the upper left corner), it only needs to cut both sides, which saves the post press processing time and reduces the printing cost. However, if the other two sides of the image are bleeding designs, it is still necessary to cut all four sides of the printed sheet

key points of binding and post press processing

only by carefully designing and arranging printing at the beginning can we ensure the harmony between printing and post press processing. In production, the following points should be noted

1. Folding

because the ink and pigment on digital printing only adhere to the paper surface, folding processing is prone to fracture. Therefore, it is best to press creases before folding, such as adopting high activity and high-strength polyamide design to manufacture the oil pan

2. Lamination

lamination processing on the surface of digital printing, especially after printing a large area of the field, will help to protect the printing in post press processing, especially when cutting or packaging. It may not be beneficial to cover the double-sided printed matter on one side, because the uncoated side may be more prone to the phenomenon of printing pigment peeling due to friction in the subsequent processing

3. Horse riding binding

horse riding binding is a good choice for most digital printed materials, especially suitable for the binding of thinner books such as guides, pamphlets and brochures. This binding method is economical and practical, and can be carried out online with other processing methods. It can carry out the post press processing of page matching, folding, binding and online cutting at the same time, which can provide a guarantee for the rapid delivery required by digital printing

4. Flat binding

when designing flat binding books, first of all, pay attention to leaving enough binding space between the binding opening and the text. For example, when the line hole ratio of O-type spiral line is 3:1 (meaning there are 3 holes per inch), at least 3/8 inch blank should be left; When the line hole ratio is 2:1, at least 1/2 inch of blank space should be left. This blank refers to the distance between the stapling opening and the nearest line hole edge

in order to clarify the specific location of flat binding processing, designers had better understand the changes of actual printed paper after digital printing from post press processors before digital printing processing, which is particularly important for digital printing. Most computer design programs do not consider the small changes in the thickness of the paper after printing. In digital printing, the color material printed on the surface of the paper will cause the thickness changes of the printed sheet. When Binding dozens of digital printed sheets, the cumulative thickness changes may make the binding size carefully calculated by the computer meaningless. Therefore, it is necessary to master the sample sheet change parameters of the actual production paper after digital printing, so as to accurately measure the book thickness in the printing design and ensure that the appropriate binding size can be obtained in the post press processing

5. Wireless adhesive binding

like the wireless adhesive binding processing of offset printing, the cutting amount of binding should also be considered for the wireless adhesive binding of digital printing. In addition to leaving 1/8 inch milling allowance on the back of the book, 1/8 inch cutting allowance should also be left on the other three sides of the book. In addition, a 1/4 inch gluing area should be left at the lower part of the book cover to prevent glue from seeping into the next book during binding. Wireless adhesive binding processing also requires that the printing of bleeding cover should be a little larger than the size of the text

6. Wireless binding hardcover

believe it or not, wireless binding hardcover processing is also an important post press processing method in digital printing and binding. The key of hardcover technology is how to firmly bond the book block and hard case to produce books that can be preserved for a long time. Although the cost and time-consuming of wireless binding hardcover seems to be a little out of proportion to the digital printing facing the short edition printing market, some post press binding enterprises have prefabricated hardcover cases of different colors, styles and sizes commonly used in digital printing hardcover for digital printers to choose. Therefore, wireless binding hardcover has also become a common binding method in digital printing