[ubuntu] poor quality printing of scanned documents

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http://ubuntuforums.org – Hello, I have an HP c3180 printer scanner copier. The printer prints and copies just fine, I have scanned images using several scanning software available for Ubuntu. The images show on the desktop as perfectly normal good quality scans. When I print the images they come out very faint to the point of being un readable. I have scanned and saved them as png, jpeg, bmp. I have tried different setting in the software and quality setting for the printer but the scans always print the same. I used GIMP to try to darken the images. I am running 11.10 any ideas anyone? (Hardware)