Canon BCI-15 and BCI-16

Theory
The ink in these cartridges are retained because the cartridges have an internal sponge.

Instructions

Step 1) Put the cartridges on some paper towels in an area where you can tolerate a spill.

Step 2) Turn the cartridge up side down so that the outlet port of the cartridge is facing upward.

Step 3) For Black - Fill the syringe with 3cc of black ink.For Color - Fill a syringe with 2cc of cyan ink, another syringe with 2cc of magenta ink and a third syringe with 2cc of yellow ink.

Step 4) Drip ink onto the felt pad in the outlet port. The felt pad will quickly absorb the ink into the cartridge. If the felt pad will not soak up any more ink and the ink just sits on top then that chamber is full. Dab a paper towel onto the felt pad to soak up any ink that did not get absorbed into the cartridge. It goes without saying that you want to put the correct color into the correct chamber. Don't drip yellow ink onto the cyan felt pad and wonder why you are now getting green.Note: Do not pierce the felt pad the the needle of the syringe.

Step 5) Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.