What is the BEST DOCUMENT INK?

Welcome back to my rabbit hole! This is a collaboration video with https://fountainfeder.de/. Check out the website for all the good stuff you love in this hobby. I got sent these inks for the purpose of review, but am not paid for this video. Every opinion is my own. The INKS I’m reviewing: Octopus Fluids Certified Document Ink Dark Blue Octopus Fluids Write & Draw Black Elephant Octopus Fluids Write & Draw Blue Koi I’m comparing them to: Graf von Faber Castell Midnight Blue DeAtramentis Document Black Rohrer & Klingner Iron Gall Salix The PAPER that I’m using is: Canson XL Marker Clairefontaine Exacompta The TOOLS that I’m using: A cocktail stirrer The Sailor Hocoro Dip Pen with a Medium and 1.1 Stub nib https://fountainfeder.de/Sailor-Hocor... Pentel Aqua Brush https://fountainfeder.de/Pentel-Aqua-... 00:29 Octopus Fluids x Fountainfeder Exclusive Inks    • Unexpected Favorite // REVIEW of the Octop...   Thank you again to Steffi from Fountainfeder as well as to Octopus Fluids for this Collaboration!