Printing technology experience

As a graphic design student, printing process practice is an essential part of the internship. This semester, under the guidance of our teacher, all the students of Grade 10 visual communication went to the internship factory near the school to inspect, and through listening to lectures and visiting modern printing enterprises, students initially established a perceptual understanding of the printing process. Through visiting the production process of some printing enterprises and related factories, students have a preliminary understanding and understanding of the process and equipment in this professional field.

Internship content:

We visited Guangdong Xinyuan Color Printing Co., LTD., where there are sound equipment, advanced printing machines, strong teachers and teachers team, practice teachers master the most advanced skills, although we do not belong to the printing industry professionals, but since the choice of printing practice should have some understanding of printing knowledge, On the understanding of the printing industry before the practice, our usual so-called printing is a series of printing processes carried out on the equipment of the machine, only a simple printing process includes three parts, the paper part, the printing part, the receiving part, each part is very complicated, to control and master the printing machine, can not make a mistake,

Lead to the entire printing ended in failure, in addition to these there are a lot of processing, typesetting, patch plate process, etc., the printing part of the entire printing process is the most critical part, five days of internship is very short.

The following points are the requirements of my work during my internship in the factory.

Some tips.

First we learned monochrome printing and two-color printing, monochrome printing is a printing process in which only one ink color is printed on the substrate. The so-called monochrome printing refers to a color printing, can also print two colors, but the effect is not good. There are many kinds of monochrome printing: monochrome rotary printing, monochrome lithography. The main printing scope is books and newspapers and magazines. Monochrome printing has a type called zinc oxide plate. Printing clarity is similar to photocopying clarity. This monochrome printing can be printed directly from the manuscript. Also known as paper printing. Paper printing is easy and fast, and lasts longer than photocopying.

Monochrome printing, in the process is relatively simple, and two-color printing is more difficult, first of all, its design color restrictions are quite many, as the name suggests, two-color printing can only appear two colors,

Effect - If neither of the two colors chosen is a proper color,

The matching relationship of colors: whether the color contrast is obvious, whether the finished product has visual impact, and whether the color collocation is aesthetic. Secondly, in terms of the area of color, two-color printing is affected by the use of paper.

Use a large area of dark color, otherwise the color will penetrate during the printing process,

Most of the paper most commonly used in factories is imported from abroad,

MDF can also be used for multiple products. It can be recommended for some customers who want to save costs. General factories have a certain amount of stock of these conventional papers in the warehouse.

Gauge paper (unless the customer orders a large number of products that warrant the factory to purchase some other expensive paper)

Technology, production cycles, growth costs, etc. all help.

Then we learned about some printing machines, there is Heidelberg

I didn't know much about it, and then I listened carefully to the teacher's teachings and explanations.

And also learned the relevant operation process. Then we also learned to ink and wash ink, although it made our hands colorful, but I still feel happy that I can learn knowledge.

It's all automatic machines, like CNC

Generally, it can produce higher efficiency. Although the factory can produce most paper products,

In the process of communication, while trying to meet customer requirements, we should also try to consider from the standpoint of the factory. For example, you can recommend something that looks the same but is simple to do,

Ben, and it's more efficient. When an order is completed, the factory will arrange every link in place. Therefore, when confirming the order with the customer, it is necessary to confirm each requirement completely. There is nothing worth learning to know that it has a complex process in its view, a millimeter of error may be a blink of an eye in the past, but left us with a deep understanding of the main knowledge and the resulting not only to consider printing after the completion of printing there is always a color degree is not enough, but also to consider two general can not use large areas of color blocks, especially taboo resulting in the back can not be printed. The selection of paper in printing is also one of the commonly used materials in the factory MDF paper. There are many other reserves, but generally it is recommended to use as often as possible, which is for the factory's processing GTO printing presses and Sakurai printing presses. At first, I initially recognized the relevant knowledge of such machines, and the machines used in many factories are more advanced, general, vertical shaft machines. Therefore, as long as the operation is proper and the personnel arrangement is reasonable, but in the future, with the customer, this can not only reduce the factory to some customers after the white body is done, the paint has a further understanding of the printing industry, and the choice of color is the first major problem in the design. In terms of processing, the structure of the CNC machine is clear.

Not sure, so put aside, not only the product is easy to deformation, but also affect the progress of the order, to the factory brought unnecessary trouble.

Printing Equipment:

Again, we need to wash the pre-press processing and post-press processing. Prepress processing is an important part of print production, including a variety of content, including prepress image processing, color separation, plate making and proofing content, but also including lithography, relief plate, gravure plate, screen plate several different plate making methods. And we learned how to do it.

Relatively speaking, post-press processing is more cumbersome, and post-press processing is the production process that makes the printed matter obtain the required shape and performance, such as: stitching: refers to the position of the book should be linked. Front mouth: also known as the mouth, refers to the reading and reading edge relative to the stitching edge. The margin between the top line of a book's text and the edge of the page. Base: The margin between the bottom line of a book's text and the bottom edge of the page. Back: also known as the back, refers to the flat part of the book that needs to be glued (or bound) after the book. Hardcover books have round backs and square backs. Title page: A sheet of paper with the title, publisher's name, and author's name on it. Some books have the backing paper and the title page printed together: the cut appears uneven knife marks. Small page: A page in a book that is smaller than the cropped size. Square back: a kind of hardcover. The back of the book is straight and perpendicular to the back cover. Corner wrapping: To wrap a layer of leather or fabric over the front corners of a book's cover. Book groove: also known as book groove or groove, refers to the groove where the cover and back cover are pressed into the connecting part of the spine after the hardcover cover is closed. Stitch distance: The distance between two adjacent stitch positions on the same book thread in the stitching. The number of stitches: In the sewing of the lock thread, the number of needle eyes of the book sewing and countless tedious links.

Finally, we learned about printing and making up. Printing is the process of transferring information from negative or positive negatives to plates or other sensitive materials by means of contact exposure. Printing plate is to separate the graphic dot on the original picture of the plate, transfer to the printing plate with a photosensitive way, for lithography printing, but also to make the graphic dot part of the plate with inophilic performance, the blank part has a hydrophilic exclusion ink performance, this image transfer procedure, for lithography printing plate. Only the original picture is printed into a printing plate, the formation of inked pictures, and then transferred to the paper through printing, in order to complete the reproduction of pictures and texts. Plate printing is a bridge process between plate making and printing. On the color separation plate, it is required to transfer the text and text of the original picture without deformation. Under the printing, the ink performance of the graphic part and the hydrophilic energy of the blank part are required to be clear, and at the same time, it must be able to withstand tens of thousands of times of stamping friction without changing its ink and hydrophilic energy. However, as an intermediate transfer process, change is bound to occur, in order to obtain its stability and less change, it is necessary to control the plate photographic performance, plate printing operation process, image transfer data, and the adaptation performance of printing, etc., in the overall specification data of the plate printing process to ensure smooth and good reproduction. Printing in the entire copying process to go through two times, a printing version, a printing version. Therefore, printing is very important in the entire reproduction process, and its quality directly affects the quality of printing and printing efficiency. However, there are many problems in the current printing process, such as proofing and printing most of the use of different plate materials, the dot changes of the two are very different; The dot expansion of proofing and printing is not consistent, which needs to be adjusted reasonably by printing plate; The quality of the printing plate itself is unstable, resulting in more rework. Therefore, it is an urgent and important task to strengthen the standardization of printing process and data quality management to achieve stability and optimization of the quality of printing.