Printing plate making process (1)

Collecting data - scanning pictures - text entry - image design - layout programming - output film - proofing - more accurate - finished

Scanner Specifications The main technical specifications of the scanner are: manuscript type, input resolution, scan density range, effective input gray scale, input speed, input data format, interface standard, input format, and input/receive override.
The type of original is transmitted or reflected, positive or negative originals, etc.
Input-in resolution is expressed in pixels per inch, in units of DPI. The direct resolution of the input resolution is also higher. The maximum input resolution for reflexive originals is typically 600 DPI-2400 DPI, and the maximum input resolution for transmitted originals is typically 300 DPI-8000 DPI.

The choice of computer creative software At present, more domestic computer art designs use the IBM PC and its compatible machines for computer-based three-dimensional and three-dimensional prison sentences and animation production, ie, video production. The appearance of the Macintosh from the very beginning was a graphical interface. Mostly used for graphic design and prepress processing. but
Can also do the plane, MAC machine can also make video, recently IBM, APPLE, MOTOROLA jointly launched the POWER PC, PC and MAC software can not be universal has become history. From the software point of view, the Windows 3.1 operating system also implements a complete graphical user interface. Most of the desktop publishing software that was previously only running on the MAC machine also has a version of Windows. For example, Photoshop software also has a MAC version. Both PC and PC versions can be used on both models.
The current computer creative software that is relatively mature and put into use (mainly the computer creative software commonly used in desktop systems) mainly includes the following types:
1. The popular graphic processing software for graphic painting software is:
(1) Adobe ILLUSTRATOR
The superior functions of designing and editing text input and icons, title words, word drawings, and various charts are commonly used by computer designers.
(2) Aldus Freehand
It is a widely used computer graphics design software introduced by Aldus Company in the United States. It is particularly popular in the advertisement production of newspapers and magazines and the production of statistical graphics.
(3) CorelDRAW:
A powerful software developed by Corel Corporation has many functions, such as graphic painting, image processing, tabulation, and production of paintings.
2, image editing software more popular image editing software:
(1) Adobe photoshop:
It is an image processing software in the field of artistic creativity and professional printing that is the most influential internationally developed and developed by the American company dobe. It is the most powerful and widely used type of auditorium communication computer software for black and white. , color image correction, revision, image special effects and color separation and other processing. Greatly welcomed by painters, photographers, designers, film and television artists, and revisionists.
(2) Adobe Dimensiona:
Three-dimensional pattern design professional software.
(3) Aldus Photostyler:
Photorstyle from Aldus of the United States is color image processing software.
3, typesetting software is currently more sophisticated color publishing software:
(1) Founder Wits and Founder Fit software:
Wits is suitable for color publishing in the Chinese print publishing industry, such as books, magazines, and advertising design.
Fit is a powerful and powerful integrated typesetting system.
(2) PageMaker:
The United States' Aldus company, PageMaker, is the most popular typesetting software for desktop publishing in the United States. Its functions have been developed earlier than ever before, and its compatibility with graphics and text is flexible.

Back-end output device printers When we completed a piece of computer creative work, I appreciated the desire to immediately see the color samples printed on paper, that is, the output effect. Preview the effect of color after printing, including whether the customer, publisher, etc. determine the choice of color renderings. Therefore, the quality of the color sample becomes a very important factor. Therefore, it can affirm the effect of the creative work in front of you to some extent, but it may also be because the recognition of color or other aspects and trust is not on the screen. The display, but the effect of proofing - it is the most convincing.
The technical development of the color printer makes it from professional to ordinary, and has become the object of choice for computer art design proofing. At present, color printers on the market mainly include color ink jet, thermal wax, heat transfer printing, thermal sublimation, and laser type.

As far as the phototypesetting machine is concerned with the printing design, the amount of the color sample is recognized, and the next step is to output the film plate printing. This is to be used is the image of the ImageSetter is an image processor, it can be directly through the DPI (raster processor) to send the computer output file, generate C, M, Y, K Four color separations, color separations can be printed directly to the printing plant. As far as the current domestic level is concerned, an image-setter with a resolution of 3000 DPI can meet the general requirements. The price of an image-setter is very expensive. It is a device that powerful companies consider to buy. In general, small-to-medium-sized companies can get their creative design documents from a color output service center and output four-color films.

First, the development trend of color desktop publishing technology?
1, powerful replace the traditional manual work. In terms of input methods, keyboards, disks, and televisions can be used to diversify input methods. In the future, prepress and post-press work will become more and more detailed.
2. The desktop system software will continue to move closer to the Windows environment. Postscript page description reviews will continue to be popular.
3, open, modular design thinking will further develop.
4, due to the use of electronic image processing technology, with the screen image proofing will be more and more used.
5. Networking of color desktop publishing systems.
6. The typesetting software is transplanted to the PC and the software used on the PC is developed.
7, the system of sales and after-sales service. From desktop printing to computer direct printing. Publishing to electronics and the web. Prepress data networking, printing multi-color high-efficiency, exquisite automation after printing, printing machine serialization.

Second, there are several types of input devices?
1. Digitizer 2, color scanner (platform type and drum type) 3, electronic color separation machine
4, video cameras, video recorders and television receivers 5, electronic digital cameras

Third, what is the difference between DPI and LPI?
DPI is the first inch, which is used to represent the processing accuracy of the image processing system. It is one of the units that measure the resolution of the image. Generally, 2*2 pixels or more corresponds to 1 network point, that is, the number of LPI screen lines is the number of lines. It is about one-half of the DPI number; scanning spots constitute one network point, that is, the number of DPIs must be greater than the LPI number by 10 to 20 times.

Fourth, what is a pixel? Resolution?
Pixels are the smallest unit that describes the image in a lattice. Although the pixel is the smallest unit describing the bitmap image, it has a fixed shape but does not have a fixed size. Resolution, representing an image processing device, to represent the fineness of images, prints.

Fifth, what is the color has nothing to do with the device?
The result of image color data obtained by a certain kind of image processing device should be able to be restored accordingly on another processing device.

What is color management? What are the contents of color management?
There is an interoperable problem between different software or hardware, how to obtain the expected consistent color under a variety of configuration possibilities, that is, study device-independent color representation, and the conversion of color representation for a specific output device. . There are three major aspects of color management: corrections, features, and transformations.

7. What is computer direct imaging printing?
Direct-imaging printing is a new type of computer typography printing technology. When coloring this kind of new technology, it does not require the process of traditionally printing the output film and then producing the PS version from the film. Instead, it uses a color desktop publishing system to edit graphics, photos, and text. After the images are processed in parallel, the images are directly presented on the printing plate for printing. The printing method achieves 1016 DPI resolution with up to 175 lines per inch quality color print.

8. What is the technical basis of the color desktop publishing system?
A graphical user interface (GUI) and "what you see is what you get" idea.
Second, the use of page description language Postscript.
Third, Macintosh computers and laser printers capable of outputting Postscript and typesetting software PageMaker use.

9. What is an open system?
Can accept any Chinese system input file, can be output to any English software for processing, the results can be sent to any kind of output device such as: electronic color machine, laser printer, laser imagesetter, computer It can also be output as a PS file, and can be exported to any output center in the world to output four-color CMYK color separation films. This is the concept of full openness. The Postscript language is the foundation.

X. What is the role of PostScrip? What are the characteristics?
effect:
PostScript language is an interface language output from the desktop system to the layout device. It is specially designed to describe images and text. A variety of desktop software systems work together and must rely on a certain format to exchange information with each other. This is the Postscript language.
The function is to record the image text on the page with a digital formula and run it on a computer. Finally, it is translated into a desired output by a Postscript decoder, such as being displayed on a screen or output on a printer or an imagesetter.
The Postscript file is just a text-based file that can be used on different computer workstations such as MAC, PC, NEXT, SUN, etc.
Features:
1) Comprehensive processing of text and images
2) The foundation for the openness of color desktop publishing systems: With the Postscript standard data format, data exchange between general-purpose computers produced by different manufacturers and various special computer systems is possible.
3) Avoid the dependence of layout on the use of equipment