Rinse the stain with cold water to remove any remaining ink. Fill the sink halfway with hot water. Pour in a tiny amount of ammonia and bleach-free liquid washing detergent. Immerse the garment in the solution after stirring it. Let it soak for at least 15 minutes. Rinse it in cold water and dry it immediately. If there are other stains on the garment, repeat this process with another bath. Always wear gloves when working with chemicals because their color can transfer to your hands. Ink stains that come from pens might be harder to remove. In such cases, try using a mixture of 1 part vinegar and 2 parts water. Soak the stained area in the solution for several hours then rinse it well under running water. Dye stains can be hard to remove completely but they can be treated much like paint. Use soap and warm water to clean the area then go over it with a soft brush or cloth. Do not use acids or chemicals without first getting expert advice from a laundry mat or appliance repair shop.