Common Solutions to CD Problems
One of the biggest culprits is instability, false saves, sudden exits, and interfaces that become "rickety" and then the interface fonts become larger, die again, and so on.
The solution is:
1, increase the memory; engage in design, no 512M memory is unthinkable.
2. Delete unused fonts. (Frequently used fonts can be placed in a folder. When installing, remove the “Copy fonts to font folder†check box, and then confirm that the font folder is just a few Shortcuts, and then what kind of fonts are needed, install them again, then click on the "Font..." hook and put them in, you can easily distinguish between commonly used and newly installed fonts, and delete them when not in use. Drop out)
3. Use 2000/XP instead (do not use Arphic CS series fonts in XP.)
4, after the problem must be uninstalled restart, reinstall. If you have a CD9 installation file on your hard drive, you can have a cup of tea at your disposal.
Second, the text layout problem. Many people complain that the text on the CD9 is not aligned, the text box is not working, and the text box cannot be turned. In fact, as long as we develop a good habit, we can solve it:
1, if you can use art text, do not use text boxes. Because the text box to turn the curve is a lot of trouble: first draw a rectangle covering the text box, then ALT + F3 call out the filter, select transparency, select black, fill in 100%, check the "freeze" (the most important step), apply , and then lift the group and remove the unwanted things.
2. When playing numbers or English, lose a space before and after.
3. After the text is over, press ctrl+T to change the character character's moment from default 20 to 0, and adjust the line moment to 120% or 150%, 200%. The text will not appear scattered.
4, the final paragraph alignment, CD often have two half-characters between the two lines of the situation, then you can select a few words by "ctrl + shift +>" or "ctrl + shit + <" key combination can be very convenient Adjustment.
Third, print problems. The solution is also very simple, that is, all pictures, effects, and shadows are converted to CMYK bitmaps. For printing, 200DPI is enough, fast and good. (Text should not be changed, otherwise it will not be clear). See the details in my post back to Yang Zi's CD print question.
Fourth, prepress issues. If you want to send film, after the imposition, bleeding, and regulation:
1, all text to curve.
2. Change all non-CMYK color models to CMYK. (The cd9 search and replace function is very powerful, so it is very convenient to deal with such items.)
3, all the rotation bitmap to bitmap.
4, all the effects, especially three-dimensional, shadow, image precision cut to separate or transpose.
5, all RGB map to CMYK.
6, the CD comes with the gradient fill is RGB, but also pay attention.
In short, be sure to check the "File Info" under the "File" menu before making a copy to the issuing company. Do not have RGB and effects.
V. Compatibility issues. In fact, as long as the deposit into cd8 format on it. 9, 10, 11 can be opened. If you want FH to recognize it, it will be saved as 6 and you will compress it when you save it.
Different points of view: The best CD9 production before the output is still saved as cd9 format, because cd8 output traps more than cd9.
Many output traps can be seen in the cd9 preview, but cd8 cannot. R0g0b0 cd9 When k100 and cd8 are four-color, the output company sees a lot of cd8-made bar codes out of four colors. The cd9 default pantone color disk in cd9 was converted to cmyk. due to incompatibility in cd8. Saving cd9 to cd8 format can cause the page size to be lost. Saved as cd8 format, the output company thought you made cd8.
Problems to be aware of before outputting files
One. Scan separation
The scanner calibration principle is to adjust the scanner to be able to faithfully copy the original's tone level information, color change, and gray balance. The specific method is to use a dedicated emission or transmission color scale to adjust the gamma values ​​of the highlights, shadows, and intermediate values ​​in the scanning software. Adjust RGB or CMYK single-channel values ​​as necessary to make the electronic image's tone, color, gray balance, and color scale consistent. The steps are as follows:
1. After the scanner is turned on for more than ten minutes, the standard color mark is placed in the scanning area, and the scanning software is started to scan with the default parameters.
2. After the scan is complete, measure the grayscale color data with a probe in Photoshop. According to needs, the highlight value and the dark tone value are adjusted in the scanning software so that the first level of the gray scale is between 250 and 255 and the dark level is between 0 and 5 in the 22nd level. If the value of the dark tone after the scan is large, it means that the dark tone is not black enough. You can increase the value of the shadow tone from 0 to a larger value to ensure that the 22nd level value is comparable to 5 or less. Of course, the calibration of the white field is also the same. Between the 19th and the 22nd level, the values ​​are not much different, roughly 10 or so, the dark tone level has not been opened, and the tone is compressed and lost. This is determined by the performance of the scanner itself and has little effect on most manuscripts. For originals with rich dark shadow levels, scanning with a roller scanner is recommended.
3. Adjust the midtone gamma so that the gray level 11 is around 125. If the 11th level is too small, increase the gamma; otherwise, decrease the gamma.
4. According to the relationship between the RGB values ​​of each level of gray scale, adjust the values ​​of the three channels so that the value of each scale in the three channels is approximately equal. If R=G=125, B=119, then the gamma value of B channel can be increased to make it not yellowish.
The scanned RGB image must be converted to CMYK before it can be output. During this time, the image was also color-coded and corrected.
Second, graphics, image processing and group edition
1. Setting of color separation parameters This mainly includes printing ink settings and separation settings.
(1) Printing ink setup 1 If coated paper is used, the ink may be TOYO INKS or SWOP INKS. Other parameters can be based on specific paper.
2 dot gain refers to the expansion of outlets at 50% of the midtones. If printing on coated paper, it is recommended to take between 12% and 15%; if printing on offset paper, use 15% to 20%; if printing on newsprint, it is 20% to 25%. The larger the value is set, the smaller the CMYK data after color separation.
3 Gray balance refers to the value of ink gray balance at the time of printing. This value is available for every printing factory.
4 Grayscale images use dot gain. By clicking this item, the grayscale image will change based on the dot gain compensation. The larger the dot gain value, the darker the display. The give option will also affect the conversion data of other modes to grayscale mode. For example, when you convert a grayscale image from RGB, select this item and the software will automatically invoke the dot gain value to compensate the grayscale value. The larger the dot gain value, the smaller the gray scale data.
(2) Separation settings Select the separation set up option under file/preference.
1 Separation Types There are two types of separations, GCR and UCR. You can choose one at a time. GCR is a gray component replacement; UCR is a background color removal. The background color removal here is different from the background color removal on the previous electric extension, so it is recommended to use the GCR mode.
2 determine the black version of the tone curve (black generation) when the gray content of the image is not very much (such as landscape pictures, portraits, etc.), usually set the black version of the tone of the black version; if the image is high saturation, High-contrast art photography can be used as a black version with a short tone and high contrast; when there are many gray components in the image (such as old paintings), the long version of the black version is used.
3 black limit The different types of manuscripts should have different values, from 70% to 90%, usually 85%.
(4) The total ink limit (tital ink limit) indicates the maximum value of the sum of four color dots. Such as coated offset printing, take
340% to 380%; newsprint is about 260%.
5 UCA Amount This value mainly increases the value of CMY at the dark tone. This value can be larger for dark manuscripts, such as 40%; otherwise, the smaller the better.
2. Color correction
Photoshop scans the output of the picture mainly from two aspects of processing: the full-color correction and selective teaching is. For full-color correction, the curves can be used to correct high and dark tone values, taking into account the tone and gray balance of the image; for selective color correction, the local color blocks in the figure can be adjusted as necessary. The amount of adjustment can not be too large, otherwise it is easy to produce hierarchical faults.
After the graphic image is processed, the groupware can be used to create a version. After the group version, the output can be output, that is, the film can be prepared.
Three output distribution
The output is based on RIP technology. That is, a raster image processor, which can convert graphics, images, and text information into a variety of large-format printers or pages of the language of the machine to understand the ability to complete the output. It can control the printing accuracy, color and format size.
No matter what kind of RIP, there are two kinds of technologies for converting electronic documents into print languages: First, color separation; second, screening. Separation is generally four-color, and sometimes there are more spot colors.
RIP is divided into hardware and software. The hardware RIP is built into the printer imagesetter or a dedicated hardware RIP chassis; the software RIP includes the software body and various device drivers. The software body is rasterized, and the formed image file is sent to a corresponding external device for output by a specific device driver. Hardware RIP is generally not flexible enough. The issuing machine can only dispatch, it can not be used, and once the host has a problem, it is not good to repair; while the software RIP is flexible, the issuing machine can be used. When the host computer has a problem, you can reinstall the RIP software by changing the host. So software RIP is more convenient to use.
There are two types of RIPs on the market today: one is the PSPNT RIP series from Peking University, and the other is Harlequin's Express RIP series. Founder's PSPNT RIP is very convenient when printing Fenton or wits-generated PS files. Special PS file generation, very fast. As long as you take the picture path while printing, you can print successfully. But the dots it generates are sometimes false, not real enough; printing is very troublesome when generating PS files on a Mac. Sometimes it is impossible to print at all. In the lower version, color preview is not available for files printed on Mac. Until the latest Founder Century RIP was launched, this problem was solved. But when previewing dot-matrix information, it cannot be stored. The Harlequin Express RIP generates outlets that are relatively solid and clear. Whether it is a Mac or a PC, the layout files on it can be printed out in a row, and can be printed directly, without the need to generate an intermediate point in the PS file. Of course, it cannot print wits or fly-through generated PS files.
Of course, there are many difficulties in outputting the output:
1 Problems with black prints After black prints were blacked out, the black text did not directly press against the background, and white text appeared around the text strokes. Because the text is reflected on each color plate, plus the change in the temperature of the printing shop, the paper will expand and contract, making overprinting inaccurate and affecting the printing effect. In order to avoid this phenomenon, when publishing, you should choose not to empty or black imprint in the corresponding options.
The consequence of converting the 2RGB mode to the CMYK mode is that there are only grayscale maps on the color separation sheet that have the equivalent of the map or the 4 color versions, rather than the desired color map. So be sure to check before posting that the image in the layout is in CMYK mode. In addition, we must also pay attention to, in Photoshop in the map processing, and merge the layers, be sure to delete the channel. Otherwise, image information will be missing when publishing.
3 Bold Font Problems This problem appears in Freehand and Pagemaker. If Freehand's Chinese font uses heavy, most cases will produce a paste word when a film is produced; while in PM Chinese uses bold, it must be a toothed overlap word. There are also problems with other font effects in PM. To avoid the above problems, the first step is to use the text in the corresponding bold text. For example, choose bold song or big black. If there is no corresponding bold typeface, you can use fill and stroke in Freehand. However, there is an experience that the size of the word can not exceed 3% of the original size. If the font itself is thick, the proportion is even smaller.
4 If there is a gray net when overprinting, if there is a gray net during overprinting, objects under the gray net will pass through. Others should also note that overprinting is specified in the file because the current version of the software does not see which objects were overprinted. How to solve this problem
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