You will need the following:
- Toner for Kyocera TK-590 black
- a toner chip
- a soldering iron
- textile adhesive tape
It may take a while for the soldering iron to reach its working
temperature. Meanwhile you can remove the cartridge from your
printer. When the soldering iron has reached its working
temperature (275°C) you can melt a filler opening into the
cartridge (picture 1).
Afterwards deburr the hole thoroughly and make sure that no plastic
splinter gets into the hole. Before refilling the toner cartridge,
you should pour out the rest of the toner powder or exhaust it with
an aspirator for toner powders. Otherwise the physical and chemical
characteristics of the old and the new toner powders could lead to
a formation of clots.