All of the inkjet cartridges we produce go through a rigorous, multi-step patented manufacturing process. This state-of-the-art process includes proprietary digital filling and sealing techniques using custom-built robotics equipment to ensure consistent and accurate filling with inks that are specially formulated for each type of cartridge. The last step for each cartridge is rigorous testing to verify the quality of that cartridge has consistent vibrant colors and to make sure there is no smearing or streaking.