Ballpoint pen and felt-tip pen stains can often be very easily removed from textiles.
The fresher the stain, the easier it is to clean. The extent to which they have penetrated the tissue is also decisive. Spray the area and let the Pro Clean Concentrate take effect if necessary. You can also use the Pro Clean Concentrate pure. Check the respective textiles for colourfastness beforehand. Then put the garment in the laundry as normal.