These are refill inks compatible with the Canon GI290 ink tanks (for the Canon Pixma G1200 G2200 G3300 G4400 and other compatible printer models). The black is a PIGMENT black and the colors are DYE (Cyan Magenta Yellow). Simply pour into the ink tank and reset the ink level counter as follows: Hold down the Black button or the Color button for at least 5 seconds. The Alarm lamp goes off and the remaining ink level counter is rest.