HP Black 2510 ink is a water-based ink with an extended decap time for reliable, intermittent printing with high-optical density. This high-performance Original HP ink maintains optimum printhead performance for easy startup after periods of non-printing. It prints sharp, dark black text with high-optical density in a single pass; offers excellent print quality for high-resolution, easyto-read barcodes; and is suitable for porous substrates.