Bulk Ink for all inkjet printers. DuraFirm Technology ink (all-brand inkjet ink) is available in 60ml, 250ml, and 1 gallon bulk ink sizes. This ink is all-brand, which means it will work on ANY inkjet cartridge whether you are refilling an HP, Epson, Canon, Lexmark inkjet, Xerox ink, Brother cartridge or other. Whats more, this ink is engineered and manufactured in the USA and is archival and UV resistant and more smudge proof / water resistant than other inks including OEM inks from original cartridge manufacturers. This ink is used in many refill shops universal around the world. Our bulk ink offers you the convenience of being able to refill ANY inkjet cartridge without compromising print quality. Bulk Ink is intended for repeat refill customers, wholesale customers, and refill / remanufacturing businesses. Bulk Ink is the way to go if you already know how to refill and are looking to save even more on your print jobs, especially if you do a lot of printing. Please choose from the following bulk ink categories of 60ml, 250ml or 1 gallon sizes: