From Prochems guide:
Ink (Ball Point)
Apply Solvex and blot and note if ink is readily
released. If so, this indicates a solvent soluble
dye. Repeat as needed. Blot, do not rub, to avoid spreading spot. If stain
persists, apply Citrus Gel (or Stain Pro for water-based inks). Rinse
thoroughly with water and blot until dry. Note:All inks are not the same
and different approaches may have to be evaluated.