I have been using the Epson utility for long time to exercise the printer and keep the ink flowing. I think this wastes too much ink. I was hoping you knew the RGB values for the lighter colors. Here is what I found online:
Light Light Black (RGB) 198,198,198
Light Magenta 255,128,255
Light Cyan 128,255,255
Light Black 128,128,128
I was using the "Purging Test Pattern- 8 Color Printers" from inksupply.com and tweaking the colors in Photoshop.
Do you know if these values are correct? I realize only the utility can force the printer to print "pure" colors for each nozzle.
But this is a close approximation, I think.