In the install instructions, upstream, at http://foo2qpdl.rkkda.com/INSTALL, under the heading "CUSTOM ICC/ICM COLOR PRINTER PROFILE (BUY)", CLP-315 is listed as a model the developer needs a profile for, which can be contributed to the foo2qpdl project if somebody obtains one.
So, perhaps that is the required fix.
If I have time, I may test the latest upstream version of foo2qpdl to see if it outputs better colours than the Ubuntu packaged version, and if not I may look into whether a better colour profile needs to be made for the printer, and whether that is something I can do.
(I am assuming that the CLP-310 and CLP-315 are essentially the same hardware, besides the colour of the plastic case.)
In the install instructions, upstream, at http:// foo2qpdl. rkkda.com/ INSTALL, under the heading "CUSTOM ICC/ICM COLOR PRINTER PROFILE (BUY)", CLP-315 is listed as a model the developer needs a profile for, which can be contributed to the foo2qpdl project if somebody obtains one.
So, perhaps that is the required fix.
If I have time, I may test the latest upstream version of foo2qpdl to see if it outputs better colours than the Ubuntu packaged version, and if not I may look into whether a better colour profile needs to be made for the printer, and whether that is something I can do.
(I am assuming that the CLP-310 and CLP-315 are essentially the same hardware, besides the colour of the plastic case.)