Excellent quality across applications. Achieve outstanding fine line detail, bold blacks, distinguishable grays, and vivid colors with HP Flex Tech Inks. Accommodate different applications such as technical drawings, blueprints, maps, presentations, and even posters. Durable ink performance. Confidently share prints with outstanding light and water fastness, print permanence, and resistance to smudging and highlighter bleed. HP Flex Tech Inks are the first inks in the technical large-format market to meet UL ECOLOGO Certification. Unlabeled cartridges make it easier to recycle and it's free with the HP Planet Partners Program.