Definitions for "Screen ruling"
Keywords:  lpi, halftone, centimetre, tint, dot
The number of lines or rows of halftone dots printed per inch on the page, measured in lines per inch (lpi).
Number of lines to the inch. The finer the screen, the sharper the detail.
The number of dots per linear inch or centimetre of a given halftone screen.
If the figure stated is ‘up to’, then any screen ruling than this will print satisfactorily. If the figure is stated as ‘plus’ it means than any screen ruling of this value will print satisfactorily but highwe screen rulings can also be used. We suggest you discuss this with the repro house involved.