Hi, I'd like to present you another review that I've made for polish fountain pen forum - that's why the text is not written in english. I'd love to prepare new scans (in english this time) but I don't have time. Anyway, I hope at least some of you will find it useful even tough you won't - probably - understand the text as polish is not the most popular language to learn But then I believe the colors have language of their own.
I'm huge fan of GvFC products. Cobalt Blue hasn't disappointed me even though blue is not my favourite color. It's good ink with good properties, a bit pricey, yes. But it's worth the money you pay for it.