paradoxmo

@Shihali so, other than aesthetics, staining the cartridge is basically harmless. It stains because the cartridges are made of polypropylene. You could just put another ink there despite the stain and it would be fine, you probably wouldn’t notice if it were an ink that was in about the same color range like a blue.

The converters do not stain as easily and you can take them apart and clean them with a pipe cleaner if that’s what you prefer.

@Shihali have you let the ammonia sit inside the cartridge overnight? Or how did you use it?