It is suggested to purchase BCH Premium Refill Kit for HP15, HP45, & HP78 which contains special tools. The detailed instruction is included in the premium kit. This manual is for people who bulk generic refill kit and want to use it for refilling HP 15, 45 and 78.
1. Facing the print head upward for HP 15, 45, or downward for HP 78, locate the ink opening in the middle of cartridge. Remove the label and use a ballpoint pen to push the ball into the cartridge
2. Attach needle to syringe and load syringe with ink
3. SLOWLY inject the ink into the cartridge. Stop if the ink begins to well up from the fill hole. DO NOT OVERFILL.
4. Clean off top of cartridge, Place scotch tape over the top of the cartridge to seal the hole.
Reinstall in printer and run one or two cleaning cycles until the cartridge begins to print correctly. Do not exceed three cleaning cycles.