HP PageWide XL 5000 User Guide - Page 126

Color fringing, Vibration, can be seen at the borders of sharp black text over a white background

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Actions 1. Make sure that you choose the correct paper type in the scan settings before scanning. 2. When dealing with copies, you must take into account that good color matching between a given original and its copy can be achieved only if both are printed on the same type of paper. In the case of scanned files, good color matching can be achieved only if your monitor is color-calibrated or compliant with sRGB or AdobeRGB standards. 3. If the above conditions are met, you should also take into account that various scanner settings can affect the final color result, such as contrast, background cleaning, content type and paper type. To obtain the best possible colors, set contrast and background cleaning to 0, set the content type to Image, and select the most appropriate type of paper according to the original you are scanning (if in doubt, use photo paper). 4. Note that the image enhancement settings are automatically reset to default values after a certain time, so you may get a different result from copying the same original if you have not checked the settings before starting the job. 5. If you scanned to a PDF file, try opening the PDF file in Adobe Acrobat and saving it as a PDF/A file. For more information, see http://www.adobe.com/products/acrobat/standards.html (English only). 6. For optimum color results, clean and calibrate the scanner as indicated in Maintenance on page 150. 7. Avoid placing the scanner in direct sunlight or near sources of heat or cold. Color fringing The problem called "color fringing" occurs when the scanner is affected by incorrect paper advance and/or miscalibration. Nevertheless, some amount of color fringing is unavoidable, especially at high scanning speeds. It can be seen at the borders of sharp black text over a white background, as in the example below (original on the left, scanned image on the right). Note the black arrow indicating the scanning direction. Actions 1. Repeat the scan after increasing the scanner's resolution (choose Max quality if scanning, Best if copying). Turn your original 90 degrees, if possible, before scanning it again. 2. If the problem persists, clean and calibrate the scanner as indicated in Maintenance on page 150. Repeat the scan at a high resolution (Max if scanning, Best if copying) and check whether the problem disappears. 3. If the problem still persists, you can diagnose this issue by analyzing the patterns 6 and 8 (A to E) of the diagnostic plot. The black horizontal lines appear slightly colored at the top and bottom of each end (in the example on the right, below). Normally, they look red at the top and blue or green at the bottom, but it could be the other way around. If you see this effect, call your support representative and report "color fringing problem after calibration". 120 Chapter 7 Scanning and copying (MFP only) ENWW

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Actions
1.
Make sure that you choose the correct paper type in the scan settings before scanning.
2.
When dealing with copies, you must take into account that good color matching between a given original
and its copy can be achieved only if both are printed on the same type of paper. In the case of scanned
files,
good color matching can be achieved only if your monitor is color-calibrated or compliant with sRGB or
AdobeRGB standards.
3.
If the above conditions are met, you should also take into account that various scanner settings can
affect
the
final
color result, such as contrast, background cleaning, content type and paper type. To obtain the
best possible colors, set contrast and background cleaning to 0, set the content type to
Image
, and select
the most appropriate type of paper according to the original you are scanning (if in doubt, use photo paper).
4.
Note that the image enhancement settings are automatically reset to default values after a certain time, so
you may get a
different
result from copying the same original if you have not checked the settings before
starting the job.
5.
If you scanned to a PDF
file,
try opening the PDF
file
in Adobe Acrobat and saving it as a PDF/A
file.
For more
information, see
products/acrobat/standards.html
(English only).
6.
For optimum color results, clean and calibrate the scanner as indicated in
Maintenance
on page
150
.
7.
Avoid placing the scanner in direct sunlight or near sources of heat or cold.
Color fringing
The problem called “color fringing” occurs when the scanner is
affected
by incorrect paper advance and/or
miscalibration. Nevertheless, some amount of color fringing is unavoidable, especially at high scanning speeds. It
can be seen at the borders of sharp black text over a white background, as in the example below (original on the
left, scanned image on the right). Note the black arrow indicating the scanning direction.
Actions
1.
Repeat the scan after increasing the scanner’s resolution (choose Max quality if scanning, Best if copying).
Turn your original 90 degrees, if possible, before scanning it again.
2.
If the problem persists, clean and calibrate the scanner as indicated in
Maintenance
on page
150
. Repeat
the scan at a high resolution (Max if scanning, Best if copying) and check whether the problem disappears.
3.
If the problem still persists, you can diagnose this issue by analyzing the patterns 6 and 8 (A to E) of the
diagnostic plot. The black horizontal lines appear slightly colored at the top and bottom of each end (in the
example on the right, below). Normally, they look red at the top and blue or green at the bottom, but it
could be the other way around.
If you see this
effect,
call your support representative and report “color fringing problem after calibration”.
120
Chapter 7
Scanning and copying (MFP only)
ENWW