How to refill a BC-20 Cartridge

Canon BC-20/23 Canon ink refill instructions

Also includes: Canon BJC-4000, BJC-4100, BJC-4200, BJC-4550, BJC-5000
and Apple StyleWriter 2400

Refilling the BC-20/23 Cartridge

For the Black BC-20 or BC-23 Cartridge, locate the round circle on top of the cartridge. There is a small hole off-center inside this round circle.
Use a 1/16 inch Thumb drill provided enlarge this small hole on top of the cartridge. (This may be covered by a label.) Drill completely through the plastic into the sponge.
Inject the Black BC-20/23 cartridge with about 30 cc of ink -- a full syringe. Insert the needle all the way into the cartridge deep into the hard sponge.
Inject S-L-O-W-L-Y to fill the entire cartridge. Be sure to remove and re-insert the needle a few times to expose the entire sponge to the ink.
You only need cover the hole with a piece of aluminum tape for extended storage or transportation to prevent leaking or drying out. Remove the tape when printing.
Set on a paper towel for an hour as a drip precaution. Expect a few drips. Cover all holes during storage to prevent leaks and evaporation.
Replace the cartridge and run 1 - 3 cleaning cycles as per printer instructions.
Or print the following pages:
http://www.refillinstructions.com/black.htm for Black
For best results, leave cartridge in printer for 8 hours after refilling so the ink can saturate the entire sponge. (Allows ink to flow to the print head).