This is hands down the best black ink in the fountain pen community. That is all : r/fountainpens

SCRIVI PENS - Black Fountain Pen, Extra Fine Nib, Fountain Pens Set Luxury Refillable Fountain Pen with Ink Cartridges

Ink Comparison: 32 Black Inks — Macchiato Man

Manuscript Calligraphy & Fountain Pen Ink, Hobby Lobby

The Ultimate Guide to Black Fountain Pen Inks: Darkest Blacks, Top 5 P – BD Pen

Our Favorite Inks: Platinum Carbon Black - The Well-Appointed Desk

22 Best Pens for Writing by Hand 2021

Artists Using Fountain Pens - The Goulet Pen Company

Retroactive) New pen day! (Info in the 1st comment, but you probably know them already) : r/fountainpens

Blackest Black Ink, Fountain Pen Ink Review

Finally got my hands on my dream pen. Bungubox Box Pro Gear Realo - The Witch. It's a beauty. : r/fountainpens

Black Alexandria Fountain Pen: Elevate Your Writing Experience - Dayspring Pens

TWSBI Brand Overview - The Goulet Pen Company