How do you refill brother ink cartridges?
Brother inkPop-off the color top, removed the clear rubber ball ring/valve.
Now you can usual refill kit to poor in the appropriate in color.
After filling the ink,replace the above two in reverse order and taped down with clear type.
Replaced the cartridge and the appropriate slot... and your good to go!
I do have to be honest, sometimes they do leak....
There are some think important to be care upon these. Like must use a medical syringe to insert ink into the inkjet cartridges. Must take care the quantity of ink
for different colors. Because more or less amount of ink from certain level may effect the printing performance of the printers.