Final answer:
Rubbing alcohol and acetone are the best substances to remove fingerprint ink. They are both solvents that can dissolve the ink components.
Step-by-step explanation:
The best substance to remove fingerprint ink is rubbing alcohol. Rubbing alcohol contains isopropyl alcohol, which is a solvent that can dissolve the components of the ink. To remove fingerprint ink, you can wet a cotton ball or a cloth with rubbing alcohol and gently dab or rub it over the ink until it comes off.
Another option is to use acetone, which is commonly found in nail polish removers. Acetone is also a solvent that can effectively remove ink stains. However, it is important to use acetone in a well-ventilated area and avoid prolonged contact with skin as it can cause irritation.
Both rubbing alcohol and acetone are flammable substances, so it is crucial to handle them with care and keep them away from open flames or heat sources.