Pre-press common questions and answers (2)

What are the commonly used methods for coloring in computer? What is the best way to define a color?
A: Whether on a computer or printing, you need a way to describe different colors. The colorimetric method is also called a color model or a color model. There are many types of color models, each of which can describe colors from different angles, but different color modes are suitable for different occasions, and the accuracy is different.
The computer color mode is:
1, RGB mode:
Also called RGB color space. It is a color light color model, it is widely used in our lives, such as televisions, computer screens, slides, etc. are using light to color. In printing and publishing, it is often necessary to scan an image. The scanner first extracts the RGB color light information on the original image when scanning. The RGB mode is an additive mode in which any color can be described by the amount of radiation of R, G, and B. When R-, G-, and B-components of the computer-defined color are in the range of 0 to 255,0, there is no stimulus, and 255 is the maximum stimulus. When R, G, and B are both 255, white light is synthesized, and when R, G, and B are both 0, black is formed. This mode is often used when displaying color definitions on the display. Images such as TV, slideshow, web, multimedia, generally use RGB mode.
2. CMYK mode:
Also known as CMYK color space. For people working in the printing industry, CMYK is the most familiar. This mode is a subtractive mode that follows the subtractive mixing rule. The essence of CMYK mode refers to the size of C, M, Y, and K dots printed when the color is reproduced. Therefore, the numerical range of C, M, Y, and K is 0%-100%. CO%MO%YO%KO% indicates white, and C100%M100%Y100%K100% indicates black.
3. HSB mode: Hue, Saturation, and Brightness modes.

Since the RGB graph is better than the CMYK graph and the color is more beautiful, can the RGB graph be output directly? What are the consequences of doing so?
A: Since the color gamut of RGB is larger than CMYK, some colors are displayed on the screen. However, four-color inks cannot be printed. To know the consequences, just try. Due to the differences in RIP, RGB images may only have black images on the separation film, no images on other color versions, and it may be that the information (dot) of the images on the four-color film is exactly the same, that is, the equivalent grayscale image. Although some distribution software or RIP can convert RGB to CMYK, it is best to use scan software or Photoshop to perform the mode conversion.

The color image is stored in the DCS format. There are pictures when printing the black and white manuscript, but there is no picture on the output film. Why is that?
A: After the picture is stored as the DCS format, there will be five files in the second half.

What is RIP? Why do you like software RIP now?
A: RIP is an acronym for Raster Processing. It refers to a software or hardware card that interprets Postscript encoding as a bitmap image in an image-based system. It is generally called a raster image processor. It plays an important role in the color publishing system. Its function is to quickly interpret the prepared page as a command that can control the output of the laser recorder. It can automatically convert text, graphics, and images in the page. Into the digital lattice information, and then use these information to control the output device to record, so that its work is "off" or "on."
The upgrading of hardware RIP requires complex processes and a long time, and it cannot adapt to the rapid development of software technology. Software RIP is widely adopted due to its rapid update, high processing quality, high speed, and display of post-processing results. And a software RIP can drive multiple imagesetters at the same time, the network function is strong.

Why not set the resolution in typography and graphics software?
A: The typesetting graphics software is an object-oriented software. Expressions of characters and graphics are expressed in an algorithm language. Objects produced are independent of the resolution. They are output at the output device resolution. The resolution of the output device is high, and the resolution of the graphic output of the production page is high. Therefore, graphics software and layout software do not set the resolution. The images imported by the layout and graphics software are read from the original image when output. This is related to the resolution of the original image.

There are several types of text in CorelDraw?
A: CorelDraw divides the text into two different types. One is art text and the other is paragraph text. Although both texts are created using text tools, they have different characteristics. With more graphic objects, more special effects can be applied to text art texts; paragraph texts can use more text formats. Based on the different characteristics of these two types of text, they can be used for different purposes respectively. If only a small amount of text is needed or more formatting is applied to the text, such as short titles and descriptions, the text can be used. Need to deal with a large number of text applications more formatting, such as newspapers, brochures, etc., can use paragraph text.

Questions and answers about AI:
Q: How do I import figures and tables in wold into AI?
A: If your computer is installed WORD and CORELDRAW8. 0 then it is fine, insert the new WORD file in CORELDRAW8. 0 into the WORD file, and then guide AI to OK. Or use a Pdf Writer printer to generate a PDF file, and then use the Touchup tool to call the Illustrator edit page in Acrobat. This can be done. Direct opening may be messed up. However, if you use some fonts such as Arphic, it will be chaotic. Or you can paste the file in Word into Coreldraw, then Ctrl+x, select Paste in the Edit menu, select Paste Picture, you can edit the file in Word, and then export the Ai format.

35Q: What is the preferred format for the eps software? Why does the format import freehand but it only shows a box (I don't know if there is a problem with printing) but it can be displayed in ps. Who can explain the characteristics of this format? A: EPS is one of the PS (PostScrip) formats. It is mainly a standard exchange or output format in prepress operations. Its characteristic is that it can maintain the features and positions of the dot matrix images, vector graphics and curve text in the original file. In some software, the EPS file can only display a frame or a very rough image, but it does not affect the output of the format and the printing on the PS printer. The full name of eps is embed postscript (embedded ps file). postscript is a print description language developed by Adobe. It can be programmed with any text editor like any other programming language. The file itself is a text file and can generally be printed on a printer as a file. generate. Specific can go to the adobe website to see. Ps has now become the de facto standard of the printing industry.

Question and answer about PM:
Q: Is it a transparent background in PS and then stored in Tif format? Why do I import PM with white edges? Anxious! help me!
A: When printing Photoshop images or placing them in other applications, you may only want to display part of the image. For example, you may want to print or display foreground objects and exclude their rectangular background. The image clipping path allows you to separate the foreground objects and make the outer area of ​​the objects transparent when you print the image or place the image in other applications. This allows you to place the image in other files without dimming the background of other files. To store a path as an image clipping path: 1 Draw and save a path or convert an existing selection into a path. (That is, you can only use the path tool to map it. Remember to name the path after it has been drawn. Otherwise, you cannot use Clipping Path.) 2 Choose Clip Path from the Path palette menu. 3 For Path, choose the path you want to store. 4 For best results with most images, leave the flatness value blank to print the image using the printer's default values. If you encounter a printing error, enter the new flatness value. The value can range from 0.2 to 100. In general, it is recommended to set the flatness value from 8 to 10 for high resolution printing (1200 dpi to 2400 dpi) and 1 to 3 for low resolution printing (300 dpi to 600 dpi). The Postscript interpreter creates curve segments by linking a series of straight line segments. The flatness setting of the clipping path determines how close the line segment is to the curve. The lower the flatness value, the more the number of straight lines used to draw the curve and the more accurate the curve. 5 Click OK. 6. Store your TIF image on it.

Q: How to insert a table in pagemaker6.5? A: Generally use the included TABLE 3.0 to copy all the tables, press CTRL and E to paste it and then see if it can, if the PM comes with the table If the software is not available, the stupid approach is to draw it by hand in PM. In addition can also be used for cd die (after exporting 300dpi then put into PM can be done) Remember cd format do not delete, in case you need to change!

Q: If I can't do gradients and shadows in my PM, then what can I do to achieve better gradients and shadows in it? A: The current PM version (6.5) doesn't have these features, but I'm not sure of advanced ones. The version will be, in fact, we can do these effects in the PS, save it into TIF and then put it into the PM, of course, you can do it on the CD, but the gradient produced in the vector software, in the printing There will be a ladder of status quo, only as a picture can solve this problem, PM restrictions too much, adobe indesign can solve these problems!

Q: How to open the MAC machine PAGEMAKER 6.5 Traditional Chinese version of the file on the PC open. A: First use TRANSMAC to turn Apple files into PC files, then I do not have to say it

Q: After I put the EPS diagram of AI8's output into PM6.5, both display and printing are mosaics. How can I use an ordinary printer (my Epson Photo1270) to properly print the EPS image placed in the PM? ? ? ? ?
A: The first point to explain is that the mosaic phenomenon does not affect future printing, and ordinary printers do not have the ability to interpret POSTscript. So the printed EPS is a mosaic. PM should print EPS graphics on general printers (non-PS printers), only print them as PDFs, and then print the PDF files with ACROBAT.

Q: In the EPS graphics put in the PM, the color seems to change after the print (adjustment)? Such as Y100M100 red feel a little red and purple, and in the PM to draw a graphic fill Y100M100 feels very red. In addition, the pictures (photos) in the EPS graphics are also light after being printed, and the images directly placed in the PM are printed well. I feel that the EPS file is a problem. How does the color printing be accurate?
A: This is the PM's bug. The PM can confirm the colors of the PM. The image colors of other formats are all displayed as an impression. You can observe carefully. The TIFF format picture is placed in the PM, and the displayed color will also be displayed. Incorrect, but there is one thing you can rest assured that does not affect the output, the reason is very simple, PM in the output is the need to connect the file, so the output is directly to the output of the connection file, but not in the PM image Output as an object. . . . . . .

Q: There are a lot of color libraries in PM. Under the premise of distinguishing between spot colors and RGB and CYMK, we can freely use the colors in each color library. When exporting, there is no particular requirement to use the colors in a certain color library.
A: Generally try to use CMYK, unless you need special colors. . . . .

Q: I actually clicked on the picture in the PM and actually came out with the hero picture viewer. How can I use the PS to edit the picture after double-clicking the picture?
A: This is a file association question