I am new ti this forum but not photography.
I print using Historical processes such as Gum Bichromate, Kallitype and Carbon , all via a digital negative.
I have a B/W darkroom that is well used.
I have started to see odd black ink marks along the print border.
Epson 3800 printer.
I have done several head cleaning cycles, as well as head alignment.
Also cleaned some of the internal parts via Jose Rodriguez great recommendations