HP Designjet T1120 610 mm User Manual

							Printing in grayscale
You can adjust the gray balance of your print in similar ways under Windows and Mac OS:
●In the Windows driver dialog: select the Color tab, ensure that the Advanced Color
Adjustments box is checked, then press the Settings button beside it.
●In the Mac OS Print dialog (T1120): select the Paper Type/Quality panel, then Gray balance.
●In the Mac OS Print dialog (T1120ps): select the Color Options panel, then Gray balance.
Under either operating system, you will then be able to make adjustments using separate controls for
highlights, midtones and shadows.
●The lightness slider simply makes the whole print lighter or darker. This slider is available under
Windows in the same window as the other grayscale controls; it is available under Mac OS by
selecting Lightness and Hue.
●The zone definition sliders can be used to define what you mean by highlight, midtone and shadow.
●The other controls for highlight, midtone and shadow can be used to adjust the gray balance of
highlights, midtones and shadows respectively.
The Reset button restores each control to its default setting.
Color management from printer drivers (T1120ps only)
This facility is available when printing on the HP Designjet T1120ps with the PostScript driver.
HP Professional PANTONE Emulation
When you use a named PANTONE color in an image, your application will normally send to the printer
a CMYK or RGB approximation to that color. But the application does not take the printer or the paper
type into account, it merely produces a generic approximation of the PANTONE color, which will look
different on different printers and on different papers.
HP Professional PANTONE Emulation can do a much better job by taking into account the
characteristics of the printer and the paper type. The results look as similar to the original PANTONE
colors as is possible on a given printer using a given paper type. This technology is designed to produce
emulations similar to those set up manually by prepress professionals.
To use HP Professional PANTONE Emulation, all you have to do is to turn it on. In fact, it is normally
on by default.
●In the Windows PostScript driver dialog: go to the Color tab and select HP Professional
PANTONE Emulation.
●In the Mac OS Print dialog: go to the Color Options panel and select HP Professional
PANTONE Emulation.
72 Chapter 7   Color management ENWW
Color management
 
						

							You can also use the Embedded Web Server to print a swatch book showing emulations of PANTONE
colors as made by your printer, together with a measure of the color difference (ΔE) between each
emulation and the original PANTONE spot color. So HP Professional PANTONE Emulation not only
provides the closest match that can be achieved on your printer; it also gives clear information on how
close the emulation is to the original spot color. See 
Printing PANTONE swatch books on page 75.
Color emulation
Your printer can emulate the color behavior of other devices: RGB devices such as monitors, and CMYK
devices such as presses and printers.
You can set color emulation in the following ways:
●In the Windows PostScript driver dialog: select the Color tab, and Printer Managed Colors.
●In the Mac OS Print dialog: select the Color Options panel, and Printer Managed Colors.
For a good emulation, the printer needs a specification of the colors these devices can reproduce. The
standard way of encapsulating such information is in ICC profiles. As part of the solution, we provide
the most common standards for the different devices.
The options are as follows.
CMYK color emulation
A traditional workflow defines color in the CMYK space. For best results, the colors must be adjusted
to the printer, because different printers will produce different colors from the same CMYK data. If the
image file you are printing was not created specifically for your HP Designjet printer, it will require some
readjustment, which can be done using one of the following options provided with your printer.
●None (Native): no emulation. The printer will use its default internal conversion from CMYK to
RGB, without following any color standard. This does not imply that results will be bad
●U.S. Web Coated (SWOP) 2 uses specifications designed to produce quality separations using
U.S. inks under the following printing conditions: 300% total area of ink coverage, negative plate,
coated publication-grade stock.
●U.S. Web Uncoated 2 uses specifications designed to produce quality separations using U.S. inks
under the following printing conditions: 260% total area of ink coverage, negative plate, uncoated
white offset stock.
●U.S. Sheetfed Coated 2 uses specifications designed to produce quality separations using U.S.
inks under the following printing conditions: 350% total area of ink coverage, negative plate, bright
white offset stock.
●U.S. Sheetfed Uncoated 2 uses specifications designed to produce quality separations using U.S.
inks under the following printing conditions: 260% total area of ink coverage, negative plate,
uncoated white offset stock.
●Europe ISO Coated FOGRA27 is designed to produce quality separations for standard ISO 12647
printing under the following printing conditions: 350% total ink coverage, positive film, coated paper.
●Euroscale Uncoated 2 uses specifications designed to produce quality separations using
Euroscale inks under the following printing conditions: 260% total area of ink coverage, positive
plate, uncoated white offset stock.
●Japan Web Coated (Ad) uses specifications developed by the Japan Magazine Publisher
Association for digital proofing of images in the Japanese magazine/advertising market.
●Japan Color 2001 Coated uses the Japan Color 2001 specification for type 3 (coated) paper. It
is designed to produce quality separations using 350% total ink coverage, positive film and coated
paper.
ENWW Color management from printer drivers (T1120ps only) 73
Color management
 
						

							●Japan Color 2001 Uncoated uses the Japan Color 2001 specification for type 4 (uncoated) paper.
It is designed to produce quality separations using 310% total ink coverage, positive film and
uncoated paper.
●Japan Color 2002 Newspaper uses the Japan Color 2002 for Newspapers specification. It is
designed to produce quality separations using 240% total ink coverage, positive film and standard
newsprint paper.
●JMPA: Japanese standard for offset press.
●Toyo is designed to produce quality separations for Toyo printing presses.
●DIC is designed to produce quality separations for Dainippon Ink Company printing presses.
NOTE:These options have no effect if the application is defining its own CMYK space, known as
calibrated CMYK or CIEBasedDEFG in PostScript terminology.
RGB color emulation
Your printer is provided with the following color profiles:
●None (Native): no emulation, for use when the color conversion is done by the application or
operating system, and therefore the data arrive at the printer already color-managed.
●sRGB IEC61966-2.1 emulates the characteristics of the average PC monitor. This standard space
is endorsed by many hardware and software manufacturers, and is becoming the default color
space for many scanners, printers and software applications.
●ColorMatch RGB emulates the native color space of Radius Pressview monitors. This space
provides a smaller gamut alternative to Adobe RGB (1998) for print production work.
●Apple RGB emulates the characteristics of the average Apple monitor, and is used by a variety of
desktop publishing applications. Use this space for files that you plan to display on Apple monitors,
or for working with old desktop publishing files.
●Adobe RGB (1998) provides a fairly large gamut of RGB colors. Use this space if you need to do
print production work with a broad range of colors.
Color management from the Embedded Web Server
Submit Job options
When you send jobs to the printer using the Embedded Web Servers Submit Job page, you have the
following color management options.
If you leave an option set to Default, the setting saved in the job will be used. If the job contains no
setting, the front-panel setting in the printer will be used.
T1120 and T1120ps options
●Color/Grayscale: you can choose to print in color, in shades of gray or in pure black and white.
●Default RGB source profile: you can choose from a selection of RGB source profiles recognized
by the printer.
●Printer emulation: you can choose to emulate a different HP Designjet printer. Default: Off (no
printer emulation).
74 Chapter 7   Color management ENWW
Color management
 
						

							T1120ps options (with PostScript or PDF jobs)
●Default CMYK source profile: you can choose from a selection of CMYK source profiles
recognized by the printer. Default: Europe ISO Coated FOGRA27.
●Rendering intent: you can select the rendering intent.
●Black point compensation: you can turn black point compensation on or off.
●HP Professional PANTONE Emulation: you can turn HP Professional PANTONE Emulation on
or off.
Rendering intent
Rendering intent is one of the settings used when doing a color transformation. As you probably know,
some of the colors you want to print may not be reproducible by the printer. The rendering intent allows
you to select one of four different ways of handling these so-called out-of-gamut colors.
●Saturation (graphics): best used for presentation graphics, charts or images made up of bright,
saturated colors.
●Perceptual (images): best used for photographs or images in which colors blend together. It tries
to preserve the overall color appearance.
●Relative colorimetric (proofing): best used when you want to match a particular color. This
method is mainly used for proofing. It guarantees that, if a color can be printed accurately, it will
be printed accurately. The other methods will probably provide a more pleasing range of colors but
do not guarantee that any particular color will be printed accurately. It maps the white of the input
space to the white of the paper on which you are printing.
●Absolute colorimetric (proofing): the same as relative colorimetric, but without mapping the
white. This rendering is also used mainly for proofing, where the goal is to simulate the output of
one printer (including its white point).
Perform black point compensation
The black point compensation option controls whether to adjust for differences in black points when
converting colors between color spaces. When this option is selected, the full dynamic range of the
source space is mapped into the full dynamic range of the destination space. It can be very useful in
preserving shadows when the black point of the source space is darker than that of the destination
space. This option is allowed only when the Relative colorimetric rendering intent is selected (see
Rendering intent on page 75).
Printing PANTONE swatch books
You can use the Embedded Web Server to print a swatch book showing emulations of PANTONE colors
as made by your printer, together with a measure of the color difference (ΔE) between each emulation
and the original PANTONE spot color.
To print a swatch book, select the Embedded Web Servers Main tab, then HP Professional PANTONE
Emulation. Select the PANTONE stock to emulate, then the PANTONE colors that you want to print.
When you have selected all the colors you want, press the Print button.
ENWW Color management from the Embedded Web Server 75
Color management
 
						

							Color management from the front panel
You can color-calibrate the loaded paper type from the front panel by selecting the Image Quality
Maintenance menu icon 
, then Calibrate color. See Color calibration on page 68.
The other color options in the front panel can all be found by selecting the Setup menu icon 
,
then Printing preferences > Color.
NOTE:These front panel settings can all be overridden by the printer driver or Embedded Web Server
settings.
T1120 and T1120ps options
●Color/Grayscale: you can choose to print in color or in shades of gray. Default: Print in color. 
●Select RGB source profile: you can choose from a selection of RGB source profiles recognized
by the printer. Default: sRGB (HP). 
●Emulate printer: you can choose to emulate a different HP Designjet printer. Default: None (no
printer emulation). 
TIP:If you have old HP-GL/2 or PostScript files made for a different HP Designjet printer, you
can send them to the printer and use the front panel to turn on the appropriate emulation mode.
76 Chapter 7   Color management ENWW
Color management
 
						

							T1120ps options (with PostScript or PDF jobs)
●Select CMYK source profile: you can choose from a selection of CMYK source profiles
recognized by the printer. Default: Europe ISO Coated FOGRA27. 
●Select rendering intent: you can select the rendering intent. Default: Perceptual. 
●Black point compensation: you can turn black point compensation on or off. Default: On. 
●HP Professional PANTONE Emulation: you can turn HP Professional PANTONE Emulation on
or off. Default: On. 
ENWW Color management from the front panel 77
Color management
 
						

							78 Chapter 7   Color management ENWW
Color management
 
						

							8 Practical printing examples
●Print a draft for revision with the correct scale
●
Print a project
●
Print a presentation
●
Print and scale from Microsoft Office
ENWW79
Printing examples
 
						

							Print a draft for revision with the correct scale
This section demonstrates how to print a draft for revision with the correct scale from Adobe Acrobat.
Using Adobe Acrobat
1.In the Acrobat window, bring the mouse cursor to the bottom left corner of the screen to check the
plot size.
80 Chapter 8   Practical printing examples ENWW
Printing examples
 
						

							2.Select File > Print.
NOTE:The page size will not be automatically selected according to the drawing size.
3.In order to keep the scale, set Page Scaling to None (which is not the default setting).
ENWW Print a draft for revision with the correct scale 81
Printing examples