HP DesignJet T795 Using your printer - Page 80

Printer emulation, In the Mac OS Print dialog PostScript printers

Page 80 highlights

● Application-Managed Colors: in this case your application program must convert the colors of your image to the color space of your printer and paper type, using the ICC profile embedded in the image and the ICC profile of your printer and paper type. ● Printer-Managed Colors: in this case your application program sends your image to the printer without any color conversion, and the printer converts the colors to its own color space. The details of this process depend on the graphics language that you are using. - PostScript (PostScript printers): the PostScript interpreter module performs the color conversion using the profiles stored in the printer and any additional profiles sent with the PostScript job. This kind of color management is done when you are using the PostScript driver and you specify printer color management or when you send a PostScript, PDF, TIFF or JPEG file directly to the printer through the Embedded Web Server. In either case you have to select the profiles to use as default (in case the job doesn't specify any) and the rendering intent to apply. - Non-PostScript (PCL, RTL, HP-GL/2): the color management is done using a set of stored color tables. ICC profiles are not used. This method is somewhat less versatile than the alternatives, but is a little simpler and faster, and can produce good results with standard HP paper types. This kind of color management is done when you are using a non-PostScript driver and you specify printer color management, or when you send a PCL, RTL or HP-GL/2 file directly to the printer through the Embedded Web Server. NOTE: There are only two color spaces that the printer can convert to its own color space using the stored color tables: Adobe RGB and sRGB if you are using Windows, Adobe RGB and ColorSync if you are using Mac OS. ColorSync is the Mac OS built-in Color Management System; so, when you select ColorSync, color management is performed by Mac OS, and it is done based on the ICC profiles of the specified paper type. ColorSync is available with the PCL3GUI driver only. ColorSync can be selected from the Color Matching panel. You are recommended to consult the Knowledge Center (see Knowledge Center on page 171) to see how to use the color management options of your particular application. To choose between Application-Managed Colors and Printer-Managed Colors: ● In the Windows driver dialog: select the Color tab. ● In the Mac OS Print dialog: select the Color Options panel. ● In some applications: you can make this choice in the application. Printer emulation If you want to print a particular job and to see approximately the same colors that you would get from printing the same job on a different HP DesignJet printer, you can use the emulation mode provided by your printer. NOTE: This option is available only when printing an HP-GL/2, PostScript or PDF job. It will work correctly only when printing on plain, coated or heavyweight coated paper. ● In the Windows HP-GL/2 or PostScript driver dialog: select the Color tab, then Printer Managed Colors, then select Printer Emulation from the Source Profile list. You can then select from the Emulated Printer list. ● In the Mac OS Print dialog (non-PostScript printers): select the Color Options panel, then Color Management > Printer, then select Printer Emulation from the Source Profile list. ● In the Mac OS Print dialog (PostScript printers): select the Color Options panel, then select from the Printer Emulation list. 72 Chapter 10 Color management ENWW

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Application-Managed Colors
: in this case your application program must convert the colors of your image to
the color space of your printer and paper type, using the ICC
profile
embedded in the image and the ICC
profile
of your printer and paper type.
Printer-Managed Colors
: in this case your application program sends your image to the printer without any
color conversion, and the printer converts the colors to its own color space. The details of this process
depend on the graphics language that you are using.
PostScript (PostScript printers):
the PostScript interpreter module performs the color conversion
using the
profiles
stored in the printer and any additional
profiles
sent with the PostScript job. This
kind of color management is done when you are using the PostScript driver and you specify printer
color management or when you send a PostScript, PDF, TIFF or JPEG
file
directly to the printer through
the Embedded Web Server. In either case you have to select the
profiles
to use as default (in case the
job doesn't specify any) and the rendering intent to apply.
Non-PostScript (PCL, RTL, HP-GL/2):
the color management is done using a set of stored color tables.
ICC
profiles
are not used. This method is somewhat less versatile than the alternatives, but is a little
simpler and faster, and can produce good results with standard HP paper types. This kind of color
management is done when you are using a non-PostScript driver and you specify printer color
management, or when you send a PCL, RTL or HP-GL/2
file
directly to the printer through the
Embedded Web Server.
NOTE:
There are only two color spaces that the printer can convert to its own color space using the
stored color tables: Adobe RGB and sRGB if you are using Windows, Adobe RGB and ColorSync if you
are using Mac OS.
ColorSync is the Mac OS built-in Color Management System; so, when you select ColorSync, color
management is performed by Mac OS, and it is done based on the ICC
profiles
of the
specified
paper
type. ColorSync is available with the PCL3GUI driver only.
ColorSync can be selected from the
Color Matching
panel.
You are recommended to consult the Knowledge Center (see
Knowledge Center
on page
171
) to see how to use
the color management options of your particular application.
To choose between
Application-Managed Colors
and
Printer-Managed Colors
:
In the Windows driver dialog:
select the
Color
tab.
In the Mac OS Print dialog:
select the
Color Options
panel.
In some applications:
you can make this choice in the application.
Printer emulation
If you want to print a particular job and to see approximately the same colors that you would get from printing
the same job on a
different
HP DesignJet printer, you can use the emulation mode provided by your printer.
NOTE:
This option is available only when printing an HP-GL/2, PostScript or PDF job. It will work correctly only
when printing on plain, coated or heavyweight coated paper.
In the Windows HP-GL/2 or PostScript driver dialog:
select the
Color
tab, then
Printer Managed Colors
, then
select
Printer Emulation
from the Source
Profile
list. You can then select from the Emulated Printer list.
In the Mac OS Print dialog (non-PostScript printers):
select the
Color Options
panel, then
Color Management
>
Printer
, then select
Printer Emulation
from the Source
Profile
list.
In the Mac OS Print dialog (PostScript printers):
select the
Color Options
panel, then select from the Printer
Emulation list.
72
Chapter 10
Color management
ENWW