I have Canon IX6800, with Mac 10.13.3. Printing on Ryonet Waterproof film.
Have tried Matte, Glossy, Glossy II, Pro Platinum, Pro Luster, Semi Gloss, and High Transparency settings, with CMYK Set at these three settings, 75 75 75 30 100, 0 0 0 100, 100 100 100 100.
Color Setting High with all Saturations and Intensity and Contrast Up. Or Greyscale on High. None of these settings produce film black enough to keep fine lines from washing out. Any advice would be appreciated.