Print knowledge summary 5A
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PS output image to CD in what format? What format should be transparent?
The resolution of the graph in PS is 300, the output is merged into TIFF format (without compression), and then imported to the CD.
Q: 1. Will the effect be good?
A: No problem with 300DPI
2. And what scale should I zoom in and zoom in on the CD? (refer to percentage) Zooming in and out will make the gradient appear striped?
A: Minimize the zoom, reduce the problem is not large, zoom 1.5 times more will make the image quality worse, the bigger the more obvious
3. What format should I use for transparent images?
It is better to use transparent images or PSD in CD, but it cannot be rotated or flipped.
The most important question: I use the CMYK mode when processing graphics in PS. Will the output be in TIFF format with color changes? Will it change again when imported into the CD?
A: There will be no change
What is color separation? In general, I listened to people saying that the sample drafts were made. When someone else took them back to separate them, then they could do the film. What kind of process is this? The so-called color separation diagram refers to the CMYK four channels PHOTOSHOP map out? Also, what do people often say about making films on CDs?
A: Separation is a printing professional term, referring to the decomposition of the various colors on the manuscript into blue (C) red (M) yellow (Y) black (K) four primary colors; in the computer printing design or graphic design In the image class software, the color separation work is to convert the color mode of the scanned image or other source image into the CMYK mode. If it is to be printed, it must be separated into yellow, magenta, cyan and black colors. This is a requirement for printing. If the image color mode is RGB or Lab, there may be only dots on the K plate when outputting. The color separation operation is very simple: just convert the image color mode to CMYK mode. When the image is exported, the image will be generated from the color channel data and divided into yellow, magenta, cyan, and black four-color film films.
Normally every output in the output can be corrected to see if it needs to be empty or imprinted. Films generally use a four-color output Green (C) Red (M) Yellow (Y) Black (K) Each has a film. CD is a typesetting and drawing software (full name: CorelDRAW8/9/10.0/11.0)
What does the registration mean?
Because printing uses four color plates for color reproduction, the registration of the four color plates can be precisely aligned. In the design draft, you can create some sight or crosshairs on your own, and some software can automatically generate the alignment mark on the four color versions.
Problems with the spine
Generally, we must first make a positive graphic, and the spine must be done in the end. Or you can use the P number or the thickness of the paper and calculate the size of the spine, or use a ruler.
What is a network cable?
The cable is the number of lines added to the screen. The expression unit is lpi. For example, a typical newspaper line can use 75 to 90 lines (75 to 90 lpi). Color offset printing uses 150~175 lines (150~175 lpi). Because the previous outlets were wired, it is customary to call all outlets plus density as network cables. To be precise, the laser photosetter explains the accuracy (resolution) of the digital file on the film. The so-called cable is the definition of the printing, we do design is to talk about resolution, to show the clarity of the image. The relationship between the cable and the resolution is: a 1.5 times network cable is equivalent to the resolution (in general).