Understanding How the Cartridges Work:

Air vent hole: This plug needs to be removed when installing the cartridges into the printer. If the air vent plug is not removed, it will cause missing color(s) or it will print a blank page.

Ink filling hole: Where to refill the cartridges.

Step 2: Installing cartridges into the printer

a. Remove your original cartridges. Install the refillable cartridges. Note the refillable cartridges are not to be used or mixed with original cartridges at the same time.

b. Remove the rubber plugs out of the air hole for air flow. If these plugs are not removed, the cartridges will not work properly.

How to refill the cartridges:

a. Remove the big plugs from the Ink filling hole. see picture below.

b. Slowly insert ink into the ink cartridges though the ink filling hole.

c. Insert the plugs back into the ink filling hole.