I have a H/P deskjet printer=why does the black ink runs out before using 100 pages of print?

1.In Windows, click on the Start button and choose Control Panel. 2.Choose Printers and Other Hardware from the menu that opens. 3.Choose View Installed Printers or Fax Printers. 4.On the window that opens, look for your printer's name. Right click on the printer's icon and choose Printing Preferences. 5.On the Print Quality tab, choose Draft or Fast (varies depending on the printer). 6.If you want to conserve your color ink, choose Grayscale Printing on the same tab (just remember you'll have to uncheck that box if you want to print something in color). 7.Press OK. That's it; now your printer will automatically print in Draft Mode (and in grayscale, if you chose that option) until you change it back. To change it, simply follow the same instructions and choose Standard for print quality. Another reason for you only running out of ink maybe is due to the font size you are using. Or is it set to bold print. And believe it or not, they make a big difference in ink usage

As the other responder said "liquid gold" - that's for sure!! When you get tired of paying all that money for ink cartridges, it may be time to invest in a laser printer. More expensive - but much more life out of a toner cartridge.