This has to be one of the most common stains I encounter when cleaning upholstery. Follow these simple steps and you'll most likely be successful in removing most if not all the ink mark.
Like any stain, ink or otherwise, the quicker you address it, the more likely that you are going to be successful in removing the mark.
Start with cool water and gently blot the mark. I suggest using a clean, white cloth. That way, you'll be able to see if there is any transfer of the ink to the cloth. Try to avoid rubbing the spot. Vigorous agitation can damage the fibre or even tear it. Remember!....use cool water! Heat could cause the stain to set making it almost impossible to remove.
When you are satisfied that you have removed as much of the ink mark as possible, you can proceed to the next step.
Surprisingly, hairspray is quite effective in removing ink. For light ink stains, spray a light application of hairspray on to a clean white rag and gently blot until the ink mark is gone. For heavier ink marks, spray the ink mark directly, saturating the spot and then gently agitate using a toothbrush. (Uhh, don't use the toothbrush for cleaning your teeth after this) Remember, don't agitate to hard as you could damage the fibre. Finish, by blotting again with cool water.
Remember, for general cleaning of your furniture or carpets call SmithWerks Carpet and Upholstery Cleaning West Vancouver.