Rather than hijack either the Diamine thread or the "shading blues" thread for my ink searches, I decided to start my own. OK, fade resistance is clearly the first of my go/no go characteristics. I want my blue to have it. I will want decent flow and feather resistance on cheap paper (which is all I use). I also want it to be resist ink eradicators. I think I'd prefer a pretty dark blue ... say, not too far from the menu immediately below the banner on this site. I don't want it to be too purplish (e.g., Diamine Imperial Blue). And let's face it, I want a darkish purple with the same virtues -- fade resistance, feather resistance, decent flow, and ink eradicator resistance. Bilberry is plenty purple enough, but I don't know about its fade resistance. Diamine Grape is probably as reddish/plum a purple as I'd want. Waterman Violet/Tender Purple, which I have, isn't dark enough to suit me.