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A Wasatch Exclusive!
Wasatch's Precision Rosette/Stochastic Hybrid Screens feature eliminates the "fourth screen" or "yellow" moiré. With it, Wasatch SoftRIP SP users print yellows and flesh tones without worrying about moiré or changing screen angles. Prints made with these separations exhibit the rosette structure that print buyers expect, while using stochastic screening to eliminate moiré. Look at the illustration below to learn how.
CMK
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CMK plus Yellow
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The best–known of all printing moiré problems arises because of the need to add a fourth screen at a 15 degree angle after all possible 30 degree angles have been used by the CMK separations, as shown above. This moiré, which is familiar to all press people, is shown even more clearly by isolating two screens at 15 degrees to each other below.
Since the invention of FM halftoning, it has become common in many high–end print shops to simply substitute an FM screen for the offending yellow plate, as shown below.
Black
Cyan
Magenta
Yellow
Prints made with these separations exhibit the rosette structure that print buyers expect, while using stochastic screening to completely eliminate the cause of most complaints regarding moiré. This well–proven method actually makes the moiré pattern shown above impossible.
With Wasatch It's Easy
Wasatch SoftRIP SP for Separations Printing makes these screen sets incredibly easy to set up. Special tools provide all the information you need to quickly configure a stochastic screen for the 15–degree plate. You can adjust the stochastic dot size both in terms of microns and of the lightest tonal value of the associated rosette screen that you can hold on press. A key to the power of this is the perfect "locked" rosette structure of Wasatch Precision Rosette Screens (WPRS).
- Read more about Wasatch Precision Rosette Screens
- Read more about SoftRIP SP for Separations Printing
- Run a test to find out if you really need WPRS
- Download a product brochure about SoftRIP SP for Separations Printing
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