HP Indigo WS6000 Indigo High Quality Color Control HQCC Process for PSPs and B - Page 43

LUTs (Look-Up Tables), Line Screens, Color Strategy, Linear LUT on press, Job Screening Type Guide

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NOTE: The following sections expand on concepts / procedures mentioned in Color profiling and refinement (PSP) on page 21 (under the Detailed Production Processes > Color profiling and refinement chapter). LUTs (Look-Up Tables) It is important to standardize the use of LUTs (Look-Up Tables) once a method of applying them is chosen. Apply LUT as Dot Gain Curve (DGC) in Color Strategy and Linear LUT on press. Line Screens It explains line screens. NOTE: This section references information found in Job Screening Type Guide (CN-2007); for a direct link see in Related documentation on page 47. Table A-4 Screening types for HP Indigo WS6000 Series Digital Presses Screen Description Recommended for Benefits Side effects HDI-175 175 lpi Main production (default screen) Good overall print quality More robust to print quality issues Can be used for matching HP Indigo press series 3000, 5000, ws4000, and w3200 Few visible moiré patterns May generate visible reddish patterns on uniform CMYK gray/brown areas More grainy than HDI-180 / HDI-180m Not recommended for uniform balanced colors (grey, brown) HDI-180 180 lpi Main production Smoother look than HDI-175 Can be used for matching HP Indigo press series 3000, 5000, ws4000, and w3200 Cyan - more visible jags on edges Not recommended for uniform balanced colors (grey, brown) HDI-180m 180 lpi Offset rosette structure ("m"= zero moiré) Standard use Best for photo/ images The smoothest screen set Good for uniform CMYK gray/ brown areas More sensitive to banding due to color plane misregistration No visible low-frequency moiré at CMK grey/browns HTS-210 Variable LPI (190-240 lpi) Average 210 lpi Uniform balanced Recommended for uniform colors (grey, brown) balanced colors (grey, brown) No jags on edges May look grainy for pictures More sensitive to print quality issues (scan band) No rosette structure More robust to color plane misregistration Sharper Rainbow196 (HP Indigo WS6000 Series Digital Presses) Variable LPI (160-300 lpi) Average 196 lpi (on 4 colors) 7 angle screen set Printing with more than 4 colors Saves an additional click for OVG prints (magenta 1). No moiré effects Sharper More sensitive to print quality issues (scan band and banding) LUTs (Look-Up Tables) 39

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NOTE:
The following sections expand on concepts / procedures mentioned in
Color profiling and
refinement (PSP)
on page
21
(under the Detailed Production Processes > Color profiling and refinement
chapter).
LUTs (Look-Up Tables)
It is important to standardize the use of LUTs (Look-Up Tables) once a method of applying them is chosen.
Apply LUT as Dot Gain Curve (DGC) in
Color Strategy
and
Linear LUT on press
.
Line Screens
It explains line screens.
NOTE:
This section references information found in
Job Screening Type Guide
(CN-2007); for a direct
link see in
Related documentation
on page
47
.
Table A-4
Screening types for HP Indigo WS6000 Series Digital Presses
Screen
Description
Recommended for
Benefits
Side effects
HDI-175
175 lpi
Main production
(default screen)
Good overall print quality
More robust to print quality
issues
Can be used for matching
HP Indigo press series 3000,
5000, ws4000, and w3200
Few visible moiré patterns
May generate visible reddish
patterns on uniform CMYK
gray/brown areas
More grainy than HDI-180 /
HDI-180m
Not recommended for uniform
balanced colors (grey, brown)
HDI-180
180 lpi
Main production
Smoother look than HDI-175
Can be used for matching
HP Indigo press series 3000,
5000, ws4000, and w3200
Cyan – more visible jags on
edges
Not recommended for uniform
balanced colors (grey, brown)
HDI-180m
180 lpi
Offset rosette
structure (“m”= zero
moiré)
Standard use
Best for photo/
images
The smoothest screen set
Good for uniform CMYK gray/
brown areas
No visible low-frequency moiré
at CMK grey/browns
More sensitive to banding due
to color plane misregistration
HTS-210
Variable LPI (190-240
lpi)
Average 210 lpi
Uniform balanced
colors (grey, brown)
Recommended for uniform
balanced colors (grey, brown)
No jags on edges
No rosette structure
More robust to color plane
misregistration
Sharper
May look grainy for pictures
More sensitive to print quality
issues (scan band)
Rainbow196
(HP Indigo
WS6000
Series
Digital
Presses)
Variable LPI (160-300
lpi)
Average 196 lpi (on 4
colors)
7 angle screen set
Printing with more
than 4 colors
Saves an additional click for
OVG prints (magenta 1).
No moiré effects
Sharper
More sensitive to print quality
issues (scan band and
banding)
LUTs (Look-Up Tables)
39