HP 761 - 400 ml - matte black - original - DesignJet - ink cartridge - for DesignJet T7100, T7200 Production Printer. Choose the inks that meet your need to produce cost-effective monochrome drawings. HP printing supplies and Original HP inks are designed and tested with the printer to provide crisp, clear, accurate quality. Consistent results and low-maintenance, trouble-free operation help you maintain high productivity and reduce costs.