Screening; Inks "Double-Hit" Printing - HP Indigo press 3050 User Manual

It is possible to control the 50 percent dot area from the job LUT tag. Adjust colors from
the Color Control tab rather than the Color Match tab to improve accuracy.
Figure 6-15. Job properties – Color Control window
The solid, 100 percent optical density slider in the Job properties - Color Control window
contains the same parameter adjustments as those in the Job properties - Color Match
window.

Screening

Jobs can be printed with different screen rulings. The higher the screen ruling, the better
the rendering of detail. Higher screen rulings are more demanding, as they require a more
finely tuned machine calibration.
HP Indigo supplies the following screen rulings:
You can print a separation several times to enhance density.
HP Indigo supplies you with alternative color order to support transparency printing.

Inks "double-hit" printing

Some Ink Mixing System inks require double-hit printing in order to achieve the desired
color saturation, and this feature performs double-hit printing without screening artifacts
(patterns). The press will double-hit only the solid and high-saturation gray levels.
ENWW
Slider for changing the job
LUT curve
Sequin – an average of 144 lines per inch (lpi)
HDI-160 – an average of 160 lpi
HDI-175 – an average of 175 lpi
HDI-180 – an average of 180 lpi
HDI set 2 – an average of 250 lpi
Job maintenance 63