
Based on the provided context and general cleaning expertise, removing a blue ink stain from a fabric sofa requires careful application of a solvent. The most commonly recommended and effective solvent for ink is alcohol.
Before attempting any cleaning method, it is crucial to test the solution on an inconspicuous area of the sofa, such as a hidden seam or the underside of a cushion. This ensures the cleaner will not cause discoloration or damage to the fabric. Once you have confirmed it is safe to proceed, you can begin the stain removal process.
Apply a small amount of isopropyl alcohol (rubbing alcohol) to a clean, white cloth or a cotton ball. Gently blot the ink stain, working from the outside edges toward the center to prevent the stain from spreading. Avoid rubbing, as this can push the ink deeper into the fabric fibers. As the ink transfers from the sofa to the cloth, be sure to switch to a clean section of the cloth to avoid reapplying the ink. Repeat this blotting process until the stain is no longer visible.
After the ink has been removed, you should clean the treated area. Lightly dampen a new, clean cloth with cool water and blot the spot to rinse out any remaining alcohol. Finally, blot the area with a dry towel to absorb as much moisture as possible and then allow it to air dry completely. For stubborn stains, this process may need to be repeated.


