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Lexmark C748 Color Quality Guide

Lexmark C748
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Notes:
Manual color correction is not useful if the software program does not specify colors with RGB or CMYK combinations.
It is also not effective in situations in which the software program or the computer operating system controls the
adjustment of colors.
The color conversion tables—applied to each object when Color Correction is set to Auto—generate preferred colors
for the majority of documents.
To manually apply a different color conversion table:
1 From the Quality menu, select Color Correction, and then select Manual.
2 From the Quality menu, select Manual Color, and then select the appropriate color conversion table for the affected object
type.
Manual Color menu
Object type Color conversion tables
RGB Image
RGB Text
RGB Graphics
Vivid—Produces brighter, more saturated colors and may be applied to all
incoming color formats.
sRGB Display—Produces an output that approximates the colors displayed
on a computer monitor. Black toner usage is optimized for printing
photographs.
Display—True Black—Produces an output that approximates the colors
displayed on a computer monitor. Uses only black toner to create all levels
of neutral gray.
sRGB Vivid—Provides an increased color saturation for the sRGB Display color
correction. Black usage is optimized for printing business graphics.
Off—No color correction is implemented.
CMYK Image
CMYK Text
CMYK Graphics
US CMYK—Applies color correction to approximate the SWOP (Specifications
for Web Offset Publishing) color output.
Euro CMYK—Applies color correction to approximated EuroScale color
output.
Vivid CMYK—Increases the color saturation of the US CMYK color correction
setting.
Off—No color correction is implemented.
How can I match a particular color (such as a corporate logo)?
From the printer Quality menu, nine types of Color Samples sets are available. These are also available from the Color Samples
page of the Embedded Web Server. Selecting any sample set generates a multiplepage printout consisting of hundreds of
colored boxes. Either a CMYK or RGB combination is located on each box, depending on the table selected. The observed color
of each box is obtained by passing the CMYK or RGB combination labeled on the box through the selected color conversion
table.
By examining Color Samples sets, a user can identify the box whose color is the closest to the desired color. The color
combination labeled on the box can then be used for modifying the color of the object in a software program. For more
information, see the software program Help topics. Manual color correction may be necessary to utilize the selected color
conversion table for the particular object.
Color quality guide
Page 5 of 6

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Lexmark C748 Specifications

General IconGeneral
ColorYes
Print technologyLaser
Time to first page (black, normal)9 s
Print speed (black, normal quality, A4/US Letter)35 ppm
Printing colorsBlack, Cyan, Magenta, Yellow
Maximum duty cycle100000 pages per month
Recommended duty cycle2500 - 10000 pages per month
Number of print cartridges1
Page description languagesMicrosoft XPS, PCL 6, PDF 1.6, PPDS, PostScript 3, XHTML
Total input capacity650 sheets
Total output capacity300 sheets
Maximum input capacity4300 sheets
Total number of input trays2
Maximum number of input trays6
Envelopes sizes7 3/4, 9, 10, B5, C5, DL
Maximum print size216 x 356 mm
Paper tray media typesCard stock, Envelopes, Labels, Plain paper, Transparencies
Non-ISO print media sizesExecutive (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 sizeA4
Wi-FiNo
Security algorithmsLEAP, MD5, PEAP, SSL/TLS
Mobile printing technologies-
Supported network protocols (IPv4)TCP/IP, AppleTalk
Supported network protocols (IPv6)TCP/IP, TCP, UDP
Standard interfacesEthernet, USB 2.0
Optional connectivityParallel, Serial (RS-232), Wireless LAN
USB 2.0 ports quantity3
Noise level (idle)32 dB
Processor frequency800 MHz
Maximum internal memory1536 MB
Sound pressure level (printing)55 dB
DisplayLCD
Control typeTouch
CertificationCAN/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 colorBlack, White
Display diagonal4.3 \
AC input voltage220 V
Power consumption (printing)- W
Sustainability certificatesENERGY STAR
Minimum RAM1024 MB
Minimum storage drive space305 MB
Mac operating systems supportedMac 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 supportedDebian 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 supportedWindows Server 2008, Windows Server 2008 R2, Windows Server 2008 x64, Windows Server 2012, Windows Server 2012 R2
Windows operating systems supportedWindows 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 altitude0 - 3048 m
Operating temperature (T-T)16 - 32 °C
Operating relative humidity (H-H)8 - 80 %
Package depth553 mm
Package width588 mm
Package height545 mm
Package weight30100 g
Weight and Dimensions IconWeight and Dimensions
Depth400 mm
Width435 mm
Height455 mm

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