screen ruling
the number of lines per centimeter or per linear inch in a halftone screen.
screen seepage
a leakage of ink through the open areas of the stencil when the printing action is stopped for a prolonged period of time.
Screen ruling
Number of raster points either per inch or per centimetre. Measured in lines per cm (l/cm) or lines per inch (lpi). A 60 l/cm raster therefore corresponds with 152 lpi.
Screen RulingThis refers to the number of lines or dots per inch in both directions on a contact screen used to make halftones or separations. Screen rulings are available from 65 lines per inch to 200 lines per inch.
On top of the sharpening and grain, I added an additional Output Sharpening layer optimized for the line screen ruling of 150 lpi and the image resolution I supplied to the magazine of 300 ppi.
 See also: Line, Image, Print, Resolution, Light
  
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