I167. Speedball Pen Cleaner.
Use to remove dried ink from your dip pens, fountain pens, or technical pens. Soak nib or pen parts in cleaner for 30 minutes; next, rinse/flush with warm water; then dry. Full cleaning can take more than one application. For light cleaning, it can be diluted with water. Can also be used to clean brushes, drafting film, and fine jewelry. Use care with this and any cleaning fluid on vintage fountain pens.