Our ink is designed for perfect use with refillable cartridge or any CISS! This ink is Anti-UV Pigment ink, which can resist against sunshine so that printings can last longer in color. Each 250ml bottle can refill 15 to 20 ink cartridges. Don't wait to refill until the cartridge is completely empty or dry out. In this case, cartridges may damage and not work again. Check printer & cartridge's working condition before refill the ink. Don't refill to any non-working ink jet printer.