Lexmark No 31. Blackening Ink

[anon_private]

I made up some 'black' ink using yellow, magenta, and cyan and filled the black cell. But I added too much cyan and now have bluish print rather than black.

Has anyone any tips for making the print darker (ideal black). The cartidge is close to full.

Thanks

A

Ps. I have yellow, magenta, and cyan inks, but no black.

Printer Lexmark Z 2390