@zdohnal Thank you for the ipp suggestion, now I have a working solution. Last week I managed to try that and I can confirm that the printer printed correctly - black was black - while hpcups 3.23.5 output seemed like if EconoMode was enabled while double-checked that it was off - black was dotted gray.
@zdohnal Thank you for the ipp suggestion, now I have a working solution. Last week I managed to try that and I can confirm that the printer printed correctly - black was black - while hpcups 3.23.5 output seemed like if EconoMode was enabled while double-checked that it was off - black was dotted gray.