signature ink/pencil ?

[YGelmanPhoto <ygelmanphoto@xxxxxxxxx>]

I have been signing my prints in pencil, and the prints are behind  
glass.

But I now have to send some prints, and am worried about smudging the  
signature.  I know an inked signature won't smudge, but will it  
compromise the archival property?

What do others do?

  -yoram