Rohrer & Klingner “reiniger” (German for "cleaner") was developed specifically to clean document inks from pens. It removes persistent stains while being gentle to seals and ink feed. To offer the most convenient handling it is equipped with the Rohrer & Klingner "erka-rapid" intra-bottle inkwell. This helps to fill the pen, without getting ink in the whole bottle of cleaner.
How to use:
Fill the cleaner in your fountain pen – allow it to soak 5 minutes – rinse your pen with plenty of water. If necessary, repeat and lengthen exposure time. One bottle should provide about 9 cleanings, depending on pen capacity.