Halftone Printing
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when printing one should always use at least a 300 dpi image.....I use the same angel on my films...some would say to use different angles but I use the same (22.5) on all my screens and have no problems.
as far as lpi...the mesh you are using will determain what lpi you should use....to find out what lpi to use divide the screen mesh by 5 ..this will give you your lpi..for example ..useing a 230 mesh screen .......230 / 5 = 46 , so on a 230 screen you should use a 45 lpi..also with halftones you should use at least a 196 or higher.
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divine intervention in the print process
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Thanks everyone for your advice. When we are burning the screens and washing them out the dot pattern is not the same. It seems like we have a wave pattern, too much is washing out. What should I adjust? This should be an easy halftone....i just cant seem to get it
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if to much is washing out then it seems that you are underexposing..... try adding some time to the exposure process.
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Correct increase the time . . . add 10 seconds at a time until you get your washout
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Sounds like you could have mesh moire - interaction between your dots and your screen, are you using 45 degree angles?
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yah try to utilized angle setting for the following: c=75 deg, m=15 deg, y=105 deg & K=45 deg. @ 45lpi
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...will practically guarantee moire.
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I agree with Dave...these angles will give a moire...try using the same ange of 22.5
works well for me.
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works well for me.
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When trying to calculate an exposure time without something like a Stouffer scale, or doing a step-wedge test, if you need more exposure, double your time. If it's still too little, double it again. If you get too much, then split the difference between the last two times.
This is pretty much how photographic processes are worked out. Kinda like f-stops on a camera.
On the other hand, the $7 or so you'll spend on a Stouffer scale will speed up the process exponentially.
This is pretty much how photographic processes are worked out. Kinda like f-stops on a camera.
On the other hand, the $7 or so you'll spend on a Stouffer scale will speed up the process exponentially.
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