I apologize for not responding sooner, we have been working with several artists in our studio recently, and I wanted to check my ConeColor ink tests before responding to you.
Different printer models can have slightly different output, but I would like to get more information and some tests from you to evaluate your inks to verify everything is correct.
After reviewing your order history, I see you started using ConeColor inks in a 3800, and purchased the Vivid magenta setup for your 3800 printer- are you now using a 3880 model, or did you order the 3800-VM setup for your 3880 printer?
I also see the last time you purchased ink from us was in 2011. At that time, I believe the 7900 HDR ink set did use a slightly different VM and LK ink than the non-HDR set for the 3880 and other non-HDR models, but the visual difference of the VM was extremely slight. I am wondering if you are experiencing effects of using older inks, such as settled pigment, particle build up in the dampers, and possibly age-related shifts of the printers.
Do you have any remaining ink in bottles? If so, please provide me with lot#s and do a smear test of your inks by shaking all the bottles, then let them sit for a few minutes to let froth settle, then using a clean Q-tip, dip into the ink and wipe evenly across a piece of coated paper- making each ink smear with the bottle it came from. Then, dry and compare the ink smears.
Please let me know your results, if you have questions, or there's anything else I can help you with.
Best regards~ Dana