L'Artisan Pastellier is french ink / calligraphy materials producers. They offer two lines of inks suitable for fountain pens: CALLIFOLIO (inks made for fountain pens, neutral PH and so on) andENCRES CLASSIQUES (not all of them may have perfect properties however I've tried most of them and had no issues in my fountain pens).
L'Artisan Pastellier inks don't get much love or attention here. I understand this as they're not easily obtainable. You may buy them directly from the producer's on-line/stationery boutique. The best thing to do is to organize group buy (I've done it twice last year for polish sountain pen board). It's nice thing to do - you get to meet a lot of people to exchange inks and the shipment cost becomes really friendly.
Bleu Equinoxe 5 is blue/black. I'm not really into blue/blacks. I find them rather boring.
DROPS OF INK ON KITCHEN TOWEL
Calendar - Kaweco Sport, eyedropper mode, broad nib