Why black in not finished ?!

[lighthunter]

Hi All
I have Hp officejet 7000 wide format printer and i use it for A3 printing photos
it uses 4 ink (CYMK)
the preinstalled Colors CYM and anather 12 Catarges (4 C , 4Y, 4M) is run out and the preinstalled black still have 25% of its ink
i printed more than 100 A3 Different photos(Landescape , portrait,Still life,>>>etc) on Mate photo paper
another thing that i feel the blacks on my prints is not deep (not pure black).
Where is the problem?

[hsmeets]

Hi All
I have Hp officejet 7000 wide format printer and i use it for A3 printing photos
it uses 4 ink (CYMK)
the preinstalled Colors CYM and anather 12 Catarges (4 C , 4Y, 4M) is run out and the preinstalled black still have 25% of its ink
i printed more than 100 A3 Different photos(Landescape , portrait,Still life,>>>etc) on Mate photo paper
another thing that i feel the blacks on my prints is not deep (not pure black).
Where is the problem?

There is no problem!

The 7000 is a printer targeted at office/business use to print text documents, powerpoint sheets etc and to a much lesser extend photo's.

This printer black ink is most likely not optimal for photo printing.

The black ink cartridge is bigger then the color cartridges which xplains why you have gone thru color faster then black.