HP Color LaserJet CM4730 User Manual

							Color matching
The process of matching MFP output color to your computer screen is quite complex because printers
and computer monitors use different methods of producing color. Monitors display colors by light pixels
using an RGB (red, green, blue) color process, but printers print colors using a CMYK (cyan, magenta,
yellow, and black) process.
Several factors can influence your ability to match printed colors to those on your monitor. These factors
include:
●Print media
●Printer colorants (inks or toners for example)
●Printing process (inkjet, press, or laser technology for example)
●Overhead lighting
●Personal differences in perception of color
●Software programs
●Printer drivers
●Computer operating system
●Monitors
●Video cards and drivers
●Operating environment (humidity for example)
Keep the above factors in mind when colors on your screen do not perfectly match your printed colors.
For most users, the best method for matching colors on your screen to your MFP is to print sRGB colors.
PANTONE® color matching
PANTONE® has multiple color matching systems. PANTONE® Matching System is very popular and
uses solid inks to generate a wide range of color hues and tints. See 
http://www.hp.com/support/
ljcm4730mfp for details on how to use PANTONE® Matching System with this MFP.
NOTEPANTONE® Colors generated may not match PANTONE-identified standards. Consult
current PANTONE Publications for accurate color. PANTONE® and other Pantone, Inc.
trademarks are the property of Pantone, Inc. © Pantone, Inc., 2000.
Sample book color matching
The process for matching MFP output to preprinted sample books and standard color references is
complex. In general, you can obtain a reasonably good match to a sample book if the inks used to create
the sample book are cyan, magenta, yellow, and black. These are usually referred to as process color
sample books.
Some sample books are created from spot colors. Spot colors are specially created colorants. Many of
these spot colors are outside of the range of the MFP. Most spot color sample books have companion
process sample books that provide CMYK approximations to the spot color.
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							Most process sample books will state which process standards were used to print the sample book. In
most cases they will be SWOP, EURO, or DIC. To get optimal color matching to the process sample
book, select the corresponding ink emulation from the MFP menu. If you cannot identify the process
standard, use SWOP ink emulation.
Printing color samples
To use the color samples, select the color sample that is the closest match to the desired color. Use the
sample’s color value in your software program to describe the object you wish to match. Colors may
vary depending on paper type and the software program used. For more details on how to use the color
samples, go to 
http://www.hp.com/support/ljcm4730mfp.
Use the following procedure to print color samples at the MFP using the control panel:
1.Touch Information.
2.Touch Sample Pages/Fonts.
3.Touch CMYK Samples or RGB Samples. The pages will print.
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							Manage printer color options on Windows computers
Setting color options to Automatic typically produces the best possible print quality for the most common
printing requirements. However, for some documents, setting the color options manually can enhance
the way the document appears. Examples of these documents include marketing brochures that contain
many images or documents that are printed on a media type that is not listed in the printer driver.
For Windows, you can print in grayscale or change the color options by using settings found on the
Color tab in the printer driver.
Print in grayscale
Select the Print in Grayscale option from the printer driver to print a document in black and white.
Setting the color options in Windows
Options on the Color tab control how colors are interpreted and printed from software programs. You
can choose either Automatic or Manual color options. For more information, see 
Manage printer color
options on Windows computers.
●Select Automatic to optimize the color and halftone used for each element in a document (such
as text, graphics, and photographs). The Automatic setting provides additional color options for
software programs and operating systems that support color-management systems. This setting
is recommended for printing all color documents.
●Select Manual to manually adjust the color and halftone modes for text, graphics, and photographs.
If you are using a PCL driver, you can adjust the RGB data. If you are using the PS driver, you can
adjust RGB or CMYK data.
To set the color options
1.Open the printer driver.
2.Click the Color tab.
3.In the Color Options area, select the option that you want to use.
4.If you selected Manual, click Settings to open the Color Settings dialog box. Adjust the individual
settings for text, graphics, and photographs. You can also adjust the general printing settings. Click
OK.
5.In the Color Themes area, select the RGB Color option that you want to use.
6.Click OK.
RGB Color (Color Themes)
Five values are available for the RGB Color setting:
●Select Default (sRGB) for most printing needs. This setting instructs the printer to interpret RGB
color as sRGB, which is the accepted standard of Microsoft and the World Wide Web Consortium
(W3C).
●Select Image optimization (sRGB) to enhance documents in which the content is mainly bitmap
images, such as .GIF or .JPEG files. This setting instructs the printer to use the best color matching
for rendering sRGB, bitmap images. This setting has no effect on text or vector-based graphics.
Using glossy media in combination with this setting provides the maximum enhancement.
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							●Select AdobeRGB for documents that use the AdobeRGB color space rather than sRGB. For
example, some digital cameras capture images in AdobeRBG, and documents that are produced
with Adobe PhotoShop use the AdobeRGB color space. When printing from a professional software
program that uses AdobeRGB, it is important that you turn off the color management in the software
program and allow the printer software to manage the color space.
●Select None to instruct the printer to print RGB data in raw device mode. To render documents
properly when this option is selected, you must manage color in the program in which you are
working or in the operating system.
CAUTIONUse this option only if you are familiar with the procedures for managing color
in the software program or in the operating system.
●Select Custom Profile when you want to duplicate the printed output from other printers. This
setting instructs the printer to use a custom input profile to more accurately predict and control color
output. You can download custom profiles from 
www.hp.com.
Automatic or manual color adjustment
The Automatic color adjustment option optimizes the neutral gray color treatment, halftones, and edge
enhancements that are used for each element in a document. For more information, see 
Select the
correct printer driver.
NOTEAutomatic is the default setting and is recommended for printing most color documents.
The Manual color adjustment option allows you to adjust the neutral gray color treatment, halftones,
and edge enhancements for text, graphics, and photographs. To access the Manual color options, from
the Color tab, select Manual, and then select Settings.
Manual color options
You can manually adjust color options for Edge Control, Halftones, and Neutral Grays.
Edge Control
The Edge Control setting determines how edges are rendered. Edge control has three components:
adaptive halftoning, REt, and trapping. Adaptive halftoning increases the edge sharpness. Trapping
reduces the effect of incorrect color alignment by slightly overlapping the edges of adjacent objects. The
color REt option smoothes the edges.
NOTEIf you notice white gaps between objects, or if you notice areas that have a slight shadow
of cyan, magenta, or yellow at the edge, choose an edge-control setting that increases the
trapping level.
Four levels of edge control are available:
●Maximum is the most aggressive trapping setting. Adaptive halftoning and color REt settings are
on.
●Normal is the default trapping setting. Trapping is at a medium level. Adaptive halftoning and color
REt settings are on.
●Light sets trapping at a minimal level. Adaptive halftoning and color REt settings are on.
●Off turns off trapping, adaptive halftoning, and color REt.
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