Acetone is an organic compound that is used as a solvent. It is a colorless, flammable liquid with a sharp odor. Acetone is found in many household products including nail polish remover, paint thinner, and cleaning products. It is also used in the production of plastics, pharmaceuticals, and explosives.

Acetone is a powerful solvent that can dissolve a variety of substances, including ball pen ink. To remove ball pen ink from a fabric, apply acetone to a cotton swab and rub it on the stain in a circular motion. Be sure to test the acetone on a small area of the fabric before applying it to the entire stain. Acetone can damage some fabrics, so it is important to test it first.

If acetone is not able to remove the ball pen stain from the fabric, you can try other solvents such as rubbing alcohol, turpentine, or mineral spirits. These solvents are also flammable, so be sure to use them in a well-ventilated area.