Good Question of the Week: Is Waterproof Ink Safe for Pens?

A student recently inquired: "Hi Marc. I went to a store in Los Angeles today to buy a recommended fountain pen with waterproof refill. The owner did everything possible to dissuade me. She said that the waterproof ink ruins a fountain pen very quickly because the ink dries in such a way that it clogs…

Do you care whether your ink is waterproof or not? : r/fountainpens

The Beginner's Guide to Fountain Pens

Question about using Gel refill for legal signatures. : r/pens

December, 2016

Ink: Water-Resistant ain't Waterproof – Writing

Ink Review -- Ten New Conklin Inks! - Pen Boutique Ltd

I like my pens to be big and my inks to be permanent : r/fountainpens

2 months of UV/Lightfastness testing. I used inks on hand and

Waterproof Ink Review: De Atramentis Document Urban Sienna in a

Brown Ink - Liz Steel : Liz Steel

SPEED Gel Pen BLACK Smooth writing Soft Grip Waterproof ink 10