For better insight on the project you can view a video on how to do it here !
Step 1: What you need !
here's the list :
-Empty Ink Cartridge
-Electrical Tape (any color)
-Regular Black Ink
Step 2: Load Ink And Poke
The only thing you need to do is to get the amount of ink u want to refill in ur syringe, and then you need to take a lighter or a open flame and heat up the needle until the top becomes red hot, then be really quick to poke the cartridge in the middle or where you think it's best and start filling up until ink drips out from around the hole
Please view all 3 images to understand the hole process !
Step 3: Copper Contacts - Geting around smart tech !
Now most new printers won't let you cheat the system just by putting back ink in the cartridges, since they keep track of ink levels !
In Lexmark's case i found what copper contacts to block out directly from the printer cartridge so that the ink reading will not work anymore , and that the printer will always think the cartridge is always new.