DURABrite™ Ultra inks offer smudge-, water- and fade-resistance for superior image quality and durable prints. Ideal for double-sided printing; inks will not bleed through. SmartValve Control Technology employs a pressure-activated valve to smoothly and rapidly deliver ink to the printheads at variable rates. MicroPiezo® ink level sensor accurately detects the ink level within the cartridge and automatically alerts the user when ink is low.