"1670" is a special Anniversary Edition of the blood red ink (Rouge Hematite) that French ink- and wax-seal-maker, J. Herbin, originally made some 340 years ago for the French...er...people? ;) I was tempted to say 'courtiers', but that's just fanciful and romantic. Hah.
A beautiful blood red ink that is somehow also deeply orange, and yet also a deep rose colour. Clean hues, with no hint of brown or dried blood at all. The subtle play of shades make it rich and subtle (not at all like the uniformly bright red ink used by zealous professors to cross and criticise examination papers!) and...okay I'll say it, "romantic" ...though I don't mean in a lovehearts sense, but in a European-languages-and-the-tradition-of-fine-writing sense of the word.