Lexmark C748 Color Quality Guide

Selecting which Color Samples set to use for a particular color‑matching problem depends on the Color Correction setting
being used (Auto, Off, or Manual), the type of object being printed (text, graphics, or images), and how the color of the object
is specified in the software program (RGB or CMYK combinations). When the printer Color Correction setting is set to Off, the
color is based on the print job information; and no color conversion is implemented.
Note: The Color Samples pages are not useful if the software program does not specify colors with RGB or CMYK
combinations. Additionally, certain situations exist in which the software program or the computer operating system
adjusts the RGB or CMYK combinations specified in the program through color management. The resulting printed color
may not be an exact match of the Color Samples pages.
What are detailed Color Samples and how do I access them?
Detailed Color Samples sets are available only through the Embedded Web Server of a network printer. A detailed Color
Samples set contains a range of shades (displayed as colored boxes) that are similar to a user‑defined RGB or CMYK value. The
likeness of the colors in the set are dependent on the value entered in the RGB or CMYK Increment box.
To access a detailed Color Samples set from the Embedded Web Server:
1 Type the printer IP address or host name in the address field of your Web browser.
Note: If you do not know the IP address or host name of the printer, then you can:
• View the information on the printer control panel home screen, or in the TCP/IP section under the Networks/Ports
menu.
• Print a network setup page or menu settings page and locate the information in the TCP/IP section.
2 Click Configuration > Color Samples > Detailed Options.
3 Select a color conversion table.
4 Enter the RGB or CMYK color number.
5 Enter an increment value from 1–255.
Note: The closer the value is to 1, the narrower the color sample range will appear.
6 Click Print.
Color quality guide
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Lexmark C748 Specifications

General

Color	Yes
Print technology	Laser
Time to first page (black, normal)	9 s
Print speed (black, normal quality, A4/US Letter)	35 ppm
Printing colors	Black, Cyan, Magenta, Yellow
Maximum duty cycle	100000 pages per month
Recommended duty cycle	2500 - 10000 pages per month
Number of print cartridges	1
Page description languages	Microsoft XPS, PCL 6, PDF 1.6, PPDS, PostScript 3, XHTML
Total input capacity	650 sheets
Total output capacity	300 sheets
Maximum input capacity	4300 sheets
Total number of input trays	2
Maximum number of input trays	6
Envelopes sizes	7 3/4, 9, 10, B5, C5, DL
Maximum print size	216 x 356 mm
Paper tray media types	Card stock, Envelopes, Labels, Plain paper, Transparencies
Non-ISO print media sizes	Executive (184 x 267mm), Folio (media size), Letter (media size), Oficio (media size), Statement (140 x 216mm), Legal (media size)
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Wi-Fi	No
Security algorithms	LEAP, MD5, PEAP, SSL/TLS
Mobile printing technologies	-
Supported network protocols (IPv4)	TCP/IP, AppleTalk
Supported network protocols (IPv6)	TCP/IP, TCP, UDP
Standard interfaces	Ethernet, USB 2.0
Optional connectivity	Parallel, Serial (RS-232), Wireless LAN
USB 2.0 ports quantity	3
Noise level (idle)	32 dB
Processor frequency	800 MHz
Maximum internal memory	1536 MB
Sound pressure level (printing)	55 dB
Display	LCD
Control type	Touch
Certification	CAN/CSA-C22.2 60950-1, CSA E60825-1, ICES-003, UL 60950-1, EN/IEC 60320-1, CE, CB IEC 60950-1, EN 60950-1, EN/IEC 61000-3, EN 55022, EN 55024, 60825-1
Product color	Black, White
Display diagonal	4.3 \
AC input voltage	220 V
Power consumption (printing)	- W
Sustainability certificates	ENERGY STAR
Minimum RAM	1024 MB
Minimum storage drive space	305 MB
Mac operating systems supported	Mac OS X 10.10 Yosemite, Mac OS X 10.11 El Capitan, Mac OS X 10.6 Snow Leopard, Mac OS X 10.7 Lion, Mac OS X 10.8 Mountain Lion, Mac OS X 10.9 Mavericks
Linux operating systems supported	Debian 7.0, Debian 8.0, SuSE Linux 10.2, SuSE Linux 10.3, SuSE Linux 11, SuSE Linux 11.1, SuSE Linux 11.2, SuSE Linux 12.0, Ubuntu 12.04, Ubuntu 14.04, Ubuntu 15.04
Server operating systems supported	Windows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2
Windows operating systems supported	Windows 10 Education, Windows 10 Education x64, Windows 10 Enterprise, Windows 10 Enterprise x64, Windows 10 Home, Windows 10 Home x64, Windows 10 Pro, Windows 10 Pro x64, Windows 7 Enterprise, Windows 7 Enterprise x64, Windows 7 Home Basic, Windows 7 Home Basic x64, Windows 7 Home Premium, Windows 7 Home Premium x64, Windows 7 Professional, Windows 7 Professional x64, Windows 7 Starter, Windows 7 Starter x64, Windows 7 Ultimate, Windows 7 Ultimate x64, Windows 8, Windows 8.1, Windows Vista Business, Windows Vista Business x64, Windows Vista Enterprise, Windows Vista Enterprise x64, Windows Vista Home Basic, Windows Vista Home Basic x64, Windows Vista Home Premium, Windows Vista Home Premium x64, Windows Vista Ultimate, Windows Vista Ultimate x64, Windows XP Home, Windows XP Home x64, Windows XP Professional, Windows XP Professional x64
Operating altitude	0 - 3048 m
Operating temperature (T-T)	16 - 32 °C
Operating relative humidity (H-H)	8 - 80 %
Package depth	553 mm
Package width	588 mm
Package height	545 mm
Package weight	30100 g

Weight and Dimensions

Depth	400 mm
Width	435 mm
Height	455 mm