Digital BW, The Print

Hi folks,

Though I am signing my matte prints using a pencil it looks like the subject of 
my photo will be signing the prints as well. He will be signing on top of the 
print in a gray area near to the bottom.

In this circumstance pencil MAY be contrasty enough to work. But if not and 
probably not I will need to get him to sign with a pen using the black from the 
ink set I will be using.

I am looking for suggestions on pens to use. Is the "old school" fountain the 
type that is used or are there others? Recommendations needed.

Many thanks,
Craig Snyder