I have found several other threads about this issue, but they are not updated and some of them are more than 3 years old !
The issue: printing in "Ultra mode" is useless, the output quality is so low you can barely read the text or use bar codes from the printed page....
Switching to retro mode seems to be the only workaround at the moment, and apparently it has been like this for many many versions (since MX 3 at least).
The explanation is Maxthon is printing a low quality screenshot of the webpage but so far, this major flaw has been acknowledged but not been fixed by the dev.
I would like to inquiry about the possible fix of this old but still on-going issue.
Alternatively, I would like to know if there is a way to change the quality manually by editing a config file for instance...