Pour solvent on spot. Rub with clean, soft cloth. Use a liquid detergent and warm water. Apply a poultice of two tablespoon sodium perborate in pint of water mixed with whiting into a paste. Repeat if necessary.
Some blue inks respond to a treatment of strong ammonia water solution applied on a layer of cotton.
Use a liquid detergent and warm water. Use a liquid detergent and warm water. Pour solvent on spot. Rub with clean, soft cloth. Apply a poultice made by mixing one part sodium citrate crystals to six parts water, mixed thoroughly with an equal amount of glycerin.