Ball pen stain is a common stain type. To remove this stain following method need to follow. This is not a very hard process. It is a very easy way to remove this stain.
Ball pen stain removal method
To remove this stain we need Methylated Spirit also called Denatured alcohol as a re-agent. Therefore, rub with methylated spirit lightly. Then Swab with it using a pad of blotting paper below. Same method you can follow for cotton, linen, silk, wool, and synthetic fabrics. So whenever you do it, just do carefully. About 95% stain must remove in this way. You can do 100% removal of stain also. But therefore, you need to keep it wet with the chemical.