Editing Halftone (section)

===Resolution of halftone screens===
{| class=floatright align=right cellpadding="1" style="border:1px solid black"
|-
|colspan=2 style="background:navy; color:white" |Typical halftone resolutions
|-
|Screen printing
|45–65 lpi
|-
|Laser printer (300dpi)
|65 lpi
|-
|Laser printer (600dpi)
|85–105 lpi
|-
|Offset press (newsprint paper)
|85 lpi
|-
|Offset press (coated paper)
|85–185 lpi
|}
The resolution of a halftone screen is measured in [[lines per inch]] (lpi). This is the number of lines of dots in one inch, measured parallel with the screen's angle. Known as the screen ruling, the resolution of a screen is written either with the suffix lpi or a hash mark; for example, "150 lpi" or "150#".

The higher the pixel resolution of a source file, the greater the detail that can be reproduced. However, such increase also requires a corresponding increase in screen ruling or the output will suffer from [[posterization]]. Therefore, file resolution is matched to the output resolution. The dots cannot easily be seen by the naked eye, but can be discerned through a microscope or a magnifying glass.