How to Refill a Fountain Pen Ink Cartridge - The Goulet Pen Company

Sharpie S-Gel Refills Black Ink Gel Pen Refills Medium Point (0.7mm) 6 Packs of 2ct 12 Total

This is how things works on Instagram: "Pen ink refills are made through a careful process that combines precision engineering with ink formulation. First, the ink reservoir—often a small plastic or metal tube—is manufactured. For ballpoint pens, the tube is usually made of plastic or brass, while gel and rollerball refills use plastic barrels with a controlled ink delivery system. Next, the ink is prepared by mixing dyes or pigments with solvents, resins, and additives to control thickness, dry