Digital Printing Q&A (1)
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What is digital?
It is expressed in binary numbers, that is, 1 is used to represent the path, and 0 is used to represent the open circuit. When information is transmitted or stored, a series of 0s and 1s are sent to the other party or the disk drive. Therefore, 0 or 1 is the most basic unit of digitization, called Bit. Now, several 0s and 1s are combined to express a symbol, which is called Byte. To put it simply, digitization uses a combination of a computer (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 digitalization in printing?
Since the 21st century has entered the digital age, the application of digital is very extensive. The audio and video systems such as radio, television, amusement instruments, tape recorders, and communications have all been digitized, while others such as data services, wallets, personal digital assistants, and so on are numerous. As a result, printing has gradually become more and more digital. Today, the preparation of documents and the copying of data are done in computers, but only in application. Basically, digitization can be applied to the following areas, including: (1) Design, (2) photography, (3) color separation, (4) imposition, (5) plate making, (6) printing, (7) paper, (8) binding, (9) books, (10) bookstores, etc.
What is design digitization?
Because the new computer is fast and powerful, and the software industry has gradually developed a number of software for printing, industrial, commercial, construction and other purposes, and there are many basic originals in the software, you can draw a variety of The kind of graphics gives people a lot of convenience, so it saves a lot of design time. Nowadays, using computer-designed patterns, you can use a broadband network to quickly transfer the image files to a remote output center or printing house, and output the printing plates in a short time. This epoch-making technology product brings us unlimited Convenience and efficiency.
What is photographic digitalization?
It is a camera that records images in a digital format. The image is divided into a number of small dots called "pixels", and each pixel is directly converted into a binary code and stored as an image file. The appearance and lens of a digital camera are not much different from those of a general camera. The biggest difference is in the image-sensing part of the image. The photo-sensing mechanism is a charge-coupled component (or image sensor Charge-Coupled Device; CCD). The sensitivity of the CCD to the intensity of the light is converted into a digital signal, and the signal is reorganized into an image file. Therefore, when using a digital camera, the material of the recorded image is not a film but a memory. The image sensor is the most critical component of a digital camera. The higher the pixel size, the better the image quality, and currently it can reach more than megapixels.
What is color separation?
When copying photos by printing method, you must first divide the photos into four basic colors: yellow, magenta, cyan, and black. The early method was to record each image on the film with a plate-making camera. Later, use the scanner to linearly decompose the image and scan it. The machine is a computer peripheral that can capture images. In recent years, the advanced flatbed scanner uses a sophisticated image sensor to directly scan the image into the lens to avoid image distortion caused by glass reflection; plus anti-reflective internal design, virtual roller scanning and each scanning channel With 16,000 color gradations, the light is kept under strict control to keep the image clear and beautiful and the color is really bright; even if the original image is extremely dark, its luminosity function will not increase the noise of the image while scanning the best results. The original will also be automatically transported, scanned and output, reducing the pre-processing time and increasing the production efficiency. The built-in light box and the preset auxiliary frame line are convenient for the user to accurately place the original before scanning, saving the scan. The time to adjust the software.
What is imposition digitalization?
Use imposition software such as QuarkExpress, PageMaker, InDesign to create a large version of the job. This not only saves a lot of time, but also the position is very accurate. The printed plate can be output on the film one time. It does not have many negative edges to be trimmed like manual imposition, and there is no overlap between two negatives. The problem of the printing plate. The benefits of imposition can also be made through a computer-to-plate machine (CTP), or through a broadband network to remote plates and printing.
What is platemaking digitization?
Directly output computer digital information to a plate-making method in which a direct plate-making machine exposes to a printing plate using laser light. This computer-to-plate (CTP) is a digital plate making method. At present, the light source can be divided into two types according to the light source and the heat sense type; and the thermal type CTP can be divided into two types of plates to be processed and processed. According to the type of imaging, it can be divided into two types: positive film and negative film type; and in the material of the plate material, it is divided into aluminum and polyester. In terms of the plate making machine, the structure can be divided into three types: inner drum type, outer drum type and platform type. The lasers used are infrared, green, purple, etc., and the speed is the fastest, the scanning speed can be as high as 55,000 lines/min, which is equivalent to 2,400 in 1 minute and 46 seconds The dpi completes a full exposure of 1,024 x 800 mm (28′′ x 40′′) chrysanthemum.