Spine problem?
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.
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What is a network cable?
The cable is the number of lines added to the screen. The expression unit is LPI. For example, the general newspaper line can use 75~90 lines (75~90 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).