Ink stains do not have to be permanent, whether they are on the couch or on the carpet. Ink stains may be erased from most household surfaces with the proper cleaning procedure. The best way to remove an ink stain is with a mixture of equal parts water and ammonia, called blacklight safe glass. If this fails, try mixing equal parts vinegar and water for more aggressive cleanup. Ink stains can also be removed with the use of solvents. These types of cleaners will loosen up the pigments in the ink so that they can be washed out. Some examples of solvents include: mineral spirits, turpentine, white wine, fruit juice, coffee, tea, etc. Be careful not to inhale these chemicals while using them. Finally, ink stains can be rubbed away with fine-grit sandpaper. This should only be done as a last resort because it can damage other materials such as leather or vinyl. The best way to prevent future staining is by thoroughly cleaning all your equipment with detergent and water after each use. This will help keep your library clean and fresh-looking.