how to change ink in hp photosmart 7520 printer

Why does HP 7520 have 2 black cartridges?

photosmart 7520 has 2 black inks–what do I buy and one not. Rather confused, can the cartridge slots be empty? The first one is narrower called Photo ink cartridge with a camera symbol and it has the SAME size with color ink cartridges. The fatter or wider one is the real black ink cartridge.

Can you print without photo black ink?

Find and right-click on your printer and click on Printing Preferences. Go to Quick Setup tab and then select Grayscale. Select Plain Paper as your media type option. Click Apply.

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