Open a hole at the top of the cartridge
Load 2ml of ink into a syringe.
Insert the syringe into the cartridge foam.
Slowly press the syringe to transfer the ink to the cartridge
Then, use a toilet paper to blow the hole of the cartridge ( the toilet paper is useful to no dirty your mouth) till the ink start to get out of the cartridge.
Cover the hole of the catridge.
It's ready!
