On my Epson c830 [5760dpi "optimized"] I get 14 pages per five lolor ink cartridge. I read a review of the 890 that said it got 24 pages per cartridge and that was "thirsty ink usage." I am using matt photo paper Mistubishi. What can I do to get more ink usage? I have been setting for 300 dpi in photoshop, printing on A4 [210mmx297mm] paper.