Printing knowledge pool 9F
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overprint, overprint, trapping, stamping? Overprinter: Refers to multi-color printing when the color version of the printed pattern of overlapping registration;
trapping: Refers to a color block and another color block connection to have a certain staggered superposition, in order to avoid printing when the white edge, so also known as Lu Bai; the place where the two color transitions may be offset in the printing process without trapping, producing white edges or color aliasing,
Trapping is the place where the handover with the two colors of the transfer of each other, will not produce white edge. Stamping and overprinting is a meaning, that is, a color block overprint on another color block.
However, when printing special attention to the black text in the color image on the overprint, do not black text under the pattern, or printing overprinter when the black text will be exposed white edge. Example: four p of magnanimity 16 open, with PS do, text with K100, sent to the center of the black Word does not imprint, that is, the position of the black word in other color plate is hollow, will cause misregister and Lu Bai, PS black text overprint is the layer of black text layer mode to multiply the bottom, so that In the other color version of the black text is not hollow, thus, there will be no Lu Bai situation. Just entered the printing industry and like to use the PS design Friend this issue must be noted. Do not go outside, must develop PS do the bottom map, CD or AI typing good habit.
This way the printed text will not have burrs.
General CD, PM black is the default imprint. 1. Do you want to overprint or trap all bitmaps?
Because some customers directly to our bitmap (some of the bitmap is quite complex) file, output proofing, also did not find any chromatic phenomenon. A: No need to overprint in a certain case, as long as the K100 black or graphics can be 2. Line overprint in the end how thick to set the color out of the film, and printing? A trace (0.01 mm) enough?
How much do you want to convert to PT unit? A: A very thin line ~ ~ 0.2 points. 1pt=0.35146mm 3. Do overprint in CDs and ill, and do they work the same principle? It's like I heard the lines in ill are half the line, aren't they?
What's it like on the CD?
A: No such claim.
4. Is it safer to overprint in a ill than a CD? Answer: Do it in the normal way. Software is just a tool, no good or more secure 5. Spot color overprint, spot color and black, special, black, is not the line to overprint? Spot color and black, specially under, black, is not with fill overprint? If you want to prevent the "two kinds of black" caused by the abnormal pattern, is it possible to overprint only lines? Or is there any other way? Or do not overprint may be the color of the set of the film? Does spot color have transparent properties?
That spot color can not and spot color with fill overprint, can only use lines to overprint?
A: Relatively speaking, the line overprint better.
6. Suppose that some kind of overprint assumption in the ill, a pattern, the middle is filled with red, green contour lines, the bottom is a green fill of the pattern, can do line overprint (with red the same layer of green contour lines, and the green at the bottom of the fill, to overprint)? Answer: Do not overprint. The normal output can be 7. If only CMYK, the pattern is similar to "Cartoon King" in the color inserts that kind of, or like "cat and mouse" in the kind of cartoon comics, animated characters have black line tick, used to express their outline. Such a complex diagram, but also to do overprint? It is difficult to imagine a color block, a color block to overprint?!
If not to overprint, then those anime magazine is how to print out?
Answer: Or that sentence, normally only black do overprint, other colors normal output.
8. If someone gives me the black contour of the artwork is made of "black" method, (for example, a piece of red green in which there is a seam, under the seam is a black), such artwork is not, "only their own tick, and then overprint," so it is not too bleak a: the seam below is a black do overprint can be In fact, overprint is very simple, remember one point can be: In general, only black words or black graphics to do overprint processing, the other color default normal output ~ If it is similar to Heidelberg such as millions of of a printing car, there is no overprint problem, but according to national conditions, now a lot of printing factory owners do not have such a good equipment,
So there is a printing car printing is not allowed to overprint phenomenon. In the overprint strokes are generally rely on experience, large area of the fill strokes to set a thick, 0.1~0.2mm for the appropriate, small area of the fill strokes to be relatively thin.
When the brush is folded, the printed matter can be seen with a magnifying glass sometimes it turns black at the stroke.