Graf von Faber-Castell Blue ink, not Cobalt Blue

[Kukuzovac]

Anyone have some experience with this ink? I can get it relatively cheap but cannot find any info on it. I would really like to know how it performs, mostly regarding bleedtrough and feathering. Thank you for any help in advance. :)

The ink in question is this

http://www.lacouronneducomte.nl/webstore/main/images/graf_inkbottle_all.jpg