The customised formula of the Dr. Beckmann Stain Devils Pens & Ink considers the special characteristics of stains caused by ballpoint pens, other pens, or watercolours. With the help of a colour-particle remover in the Stain Devils liquid, the colour pigments are separated and removed from the fabric. Ideal for: Stains of Pencils, Colour markers, Felt-tip pens, Finger paints, Flip chart and whiteboard pens, Gel pens, Adhesives (solvent-free), Chalk (street art), Pen Glue/Wood glue (solvent-free), Text markers, Ink (except black), Wax crayons, Watercolours. Not suitable for: Black ink (since it is indelible), Carpets, Leather. For particularly stubborn stains: Allow the fluid to work for longer. Dab the stained area thoroughly with a dry cloth. Wash fabric as normal. For non-washable fabrics: Dab the stained area thoroughly with a damp cloth after following the stain removal method above.