QUOTE (Dr.Grace @ Sep 20 2006, 11:57 PM)
QUOTE (saintsimon @ Sep 20 2006, 02:12 PM)
Hmm, a dark purple, but possibly not the Aubergine/eggplant i want ...

Seems obvious, but have you tried De Atramentis Aubergine? If it's not dark enough for you, you might be able to add a trace of black or brown.
Yes, I bought the De Atramentis 'Aubergine' at a local shop and first thought 'this is it', but it feathers way too much and this was the ink where I discovered to my surprise, that dark Aubergine is not easy to read. Somehow the/my visual system doesn't favour this colour on white paper. Of course I can 'read' the text as such, but the feeling of strange contrast is present.
I also have J. Herbin Poussière de Lune and Caran D'Ache Storm. The first is nice but not really dark - untill you let it dry in a pen for weeks, then it becomes similar to 'Aubergine'. Storm is somewhat darker* and a first compromise for an elegant eggplant colour.
* a few months ago, when Caran D'Ache introduced the new ink line, I wrote as first impression somewhere in this forum, Storm is the same as J. Herbin Poussière de Lune in a different bottle, but now I agree with Michael Richter that these are different inks.