This may have been covered elsewhere but I couldn't find it (just having a crap day for searching I suspect).

Shimmer inks: Diamine, Herbin and so on. How do you get the best out of them? I have three of the Herbin offerings and get no shimmer from any of my admittedly limited group of fountain pens. This is after giving the bottle a damn good shaking. I know the shimmer is there because if I use an italic or music dip nib it does show in all its glory.

So, recommendations for fountain pens to use with such exotic inks?