OK, so the report is that it is only seen after a print is produced, but the image in Qimage is OK before you printed.
The answer is most likely that there is a driver setting that is wrong or corrupted.
First thing I would try is to click HELP in Qimage, and then click on RESET Printer.
After that, you will have to reset your driver to the correct paper, quality setting, and any other color management setting you use.
Do not use any preset saved printer setups.
You should also check Mike's articles on various printing problems some especially unique to HP printers only.
There are a number of articles, starting with this.
http://ddisoftware.com/tech/articles/april-2006-houston-we-have-a-%28printing%29-problem/Let us know if the reset solves the problem.
Fred