Finally getting around to raising an issue I have faced for years and never made much inroads into...
I have a Canon iX6530 A4 / A3 inkjet printer purchased in Japan. It is connected via a USB cable to my Jessie PC. I have the Canon iX6500-series driver installed. It seems to work fine. I have shared the printer via CUPS and, sometime back, also fannied around with AirPrint in a way I don't completely remember as well as fannying around with samba print sharing in the apparently mistaken belief that these were needed to share the printer with Windows. I am successfully able to print to the printer from the Jessie box it is connected to, and also from my iOS devices of various stripes and ages, Windows 7 VMs running on the Jessie machine, a stretch box also on my network -- in short, anything I try to. The issue is that, when I print a photo natively from Jessie, the colours come out rather dark and the overall resulting picture isn't very good. Photos in particular suffer for this but I even notice it with coloured text -- for example printing a PDF with a table where a cell is shaded in green, it comes out of the printer looking nearer to black. It's green, but it's very, very dark. On the other hand, when I print the same images from the Windows VMs, they come out great. Colours are better balanced and the photos look much better. The above-mentioned PDF table cell comes out looking green not black. Keep in mind the only route to this printer is through the USB cable attached to the Jessie box. I don't know how data from the Windows machines is getting to CUPS, exactly (Windows sees a network printer but I don't know which of the redundant setups I did is serving it) but once it gets there everything from that point, most notably the printer driver, is the same. I can just print from Windows when I want a good quality outcome, but it doesn't sit well with me that Windows is doing something better than Jessie, so I want to fix it. Any idea what I should be looking at? Thanks Mark
