HP Designjet T2500 eMultifunction Printer series - Manual (Page 217)

Variable line thickness or missing lines
When scanning some CAD plots at Standard resolution, mostly when working with grayscale or black-and-
white prints that contain very thin lines, you may see a variation in line thickness, or even some missing lines,
in some places:
Actions
1. Repeat the scan or copy using a higher resolution (High or Max if scanning, Normal or Best if copying).
You should also set background cleaning to 0, or set the content type to Mixed. You might also
deactivate the automatic de-skew as explained in
A copied or scanned image is very skewed
on page 219 . In case you were working in black-and-white mode, we recommend using grayscale
instead.
2. If the problem persists, turn the original plot 90 degrees before scanning it again.
3. If the problem persists, clean and calibrate the scanner as indicated in Scanner maintenance
on page 156 .
4. If the problem persists, see Defocus, blurring and fading colors on page 212 .
Inaccurately reproduced colors
You have to deal with several variables if you want perfect color matching between the original you are
scanning and the copy or scanned file you obtain as a result. If you find undesired colors in cases like the
example shown below (original on the left, scanned image on the right), you can follow these guidelines.
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).
ENWW Variable line thickness or missing lines 207