Questions and Answers on Basic Knowledge of Digital Printing (I)

What is digital?

It is represented by a binary number, which means that 1 is used to represent the path, and 0 is used to represent the disconnection. In the transmission or storage of information, a series of 0s and 1s are sent to each other or to the disk drive. Therefore, 0 or 1 is the most basic unit of digitization and is called Bit. Now, combining a number of 0 and 1 to express a symbol is called Byte. Simply put, digitization is the use of a combination of a calculator (or hardware) and a program (or software) to replace the work that was previously done manually, so that the job is simplified and quickly and automatically completed.

What are the applications of digitization in printing?

Since the 21st century has entered the digital age, digital applications are very extensive. Digital audio and video systems such as broadcasting, television, game instruments, tape recorders, and communications have all been digitized. Others such as data services, wallets, personal digital assistants, etc. are numerous. As a result, printing has gradually become fully digitized. Nowadays, the preparation of documents and the copying of data are all done in a calculator, but the application is different. Basically, digitization can be applied in the following areas, including: (1) design, (2) photography, (3) color separation, (4) imposition, (5) plate making, (6) printing, (7) paper, (8 ) Stapling, (9) books, (10) bookstores, etc.

What is design digitization?

Because the new calculator is fast and powerful, plus the software industry has gradually developed a lot of software for printing, industrial, commercial, architectural and other purposes, and many basic elements are included in these software, and various types can be drawn. All kinds of graphics give people a lot of convenience, thus saving a lot of design time. Nowadays, using computer-designed patterns, broadband networks can be used to quickly transfer drawing files to remote output centers or printing plants, and printing plates can be printed in a short time to complete printing. This epoch-making technology product brings us endless possibilities. The convenience and benefits.

What is digital photography?

It is a camera that uses digital format to record images. It divides the image into small dots called "pixels", and converts each pixel directly into binary code and stores it as an image file. Digital camera appearance, lens and general camera is not much different, the biggest difference in the photosensitive part of the image, the photosensitive mechanism is the use of charge-coupled components (or image sensor Charge-Coupled Device; CCD). Through the sensitivity of the CCD to the light intensity, it is converted into a digital signal, and then the signal reorganization is converted into an image file. Therefore, when using a digital camera, the material of the recorded image is not the film but the memory. The image sensor is the most critical component of a digital camera. The higher its pixel, the better its image quality, which can reach several million pixels.

What is color separation digital?

When copying photographs by printing methods, the photographs must be divided into four basic colors of yellow, magenta, cyan, and black. In the early method, each color image was recorded on a film by a plate making camera. Then, the image was linearly decomposed and scanned using a scanner. The machine is a peripheral device that can capture images. In recent years, the progressive platform scanners use sophisticated image sensors to scan images directly into the lens to avoid image distortion caused by glass reflections; plus anti-reflection internal design, virtual roller scan and each scanning channel With 16,000 color levels, the light is kept under rigorous control with clear and detailed images and true color; even if the original image is extremely dark, its photometric sensing function will not increase the noise but also scan the best results. The originals are also automatically transported, scanned, and output, reducing pre-processing time and increasing production efficiency. Built-in light boxes and preset auxiliary frames facilitate the user to accurately place originals before scanning, saving the need for scanning. Time for software adjustment.

What is digital imposition?

Use imposition software such as QuarkExpress, PageMaker, InDesign to make large-format jobs.

This not only saves a lot of time, but also the position is very accurate. The printed plates can be printed on the film in one go. There will not be many edges on the film to be trimmed like hand-made imposition, nor will there be any overlap between the two negatives. Shaiban failure. The benefit of the imposition can also be made by the calculator direct plate making machine (CTP) printing plate, but also through the broadband network transmission to the remote plate making, printing.
What is digital platemaking?

The digital information of the calculator is directly output to the plate making method of the direct plate-making machine which uses the exposure of the laser beam to the printing plate. This type of computer-to-plate (CTP) is a digital plate-making method. At present, light sources can be divided into light-sensitive and heat-sensitive light sources depending on the light source; heat-sensitive CTPs can be divided into two types of plates that require processing and free handling. According to the type of imaging, it can be divided into two kinds: positive film and negative film type; and in the material of the plate, it can be divided into aluminum and polyester (polyester). In terms of the platemaking machine, its structure can be divided into three types: inner drum, outer drum, and platform. The laser used has several types of infrared, green and purple lasers. The speed of the laser is to be the fastest for the laser, the scanning speed can be as high as 55,000 lines/minute, equivalent to 1,024 x 800mm at 2,400dpi within 1 minute and 46 seconds. (28"x40") Full exposure of chrysanthemum.

What is digital printing?

Digital Printing (Digital Printing) is a simple definition of how to use a file to complete printing. Whether this digital file is obtained from a CD, diskette, network, or other media, it can be printed and reproduced. To further illustrate digital printing, a print job that uses RIP to convert any file format for processing produces a bitmap image file for output. This can include short-run, unprinted fast prints such as laser prints, electromagnetic prints, and sprays. Ink printing, direct plate printing machine (DI) and so on.

What kind of digital printing?

Mainly divided into:

(1) The calculator prints images directly on the paper, such as: inkjet, dusting, heat transfer.

(2) The calculator goes directly to the image carrier (print plate, cylinder), eg electrophotographic, electromagnetic, direct on-machine plate making. According to the printing mode can be summarized as: inkjet, thermal transfer, electrostatic (electromagnetic), digital lithography and other four. The ink-jet printing system mainly uses water-based or oil-based inks, and controls the ink amount and diffusion characteristics in the nozzles through a calculator to achieve image reproduction effects. The dusting system mainly uses direct printing in which a toner is directly ejected to a recording medium such as paper. Can achieve low-cost, fast and stable high-quality printing. Thermal transfer printing systems are mainly hot wax type and thermal sublimation type. The printing method is to use a calculator to control the heat print head and transfer the image or text to the substrate through the wax ribbon or the dye-sublimation printing material. Electrostatic (electromagnetic) printing systems are mainly charged powdery or electrolytic inks that are absorbed on substrates such as paper or plastics. The inks are then heated to melt and adhere to the substrates to form images. Digital lithography machines use the digital data output by the calculator to directly make plates on the printing press and then use the lithographic printing principle to complete the printing.

What is paper digitization?

Using digital technology to create a display media like plain paper is a pretty good idea. Japan has developed a similar type of paper for information display. It can use electricity to erase and rewrite many times of media with heat. However, this kind of rewritable media is not intended to be used as most of the printed matter, but it can be competitive for certain applications of paper. This type of paper can only be used for fuel cards, stored-value cards, etc. Currently, we will wait and see if we still need a period of research and development that can be used to read books such as magazines and books.

What is digital binding?

Stapling mostly refers to the use of a calculator to control the adjustments of the bookbinding equipment.