I found this information awhile back and actually used it when I made a project a while back. I actually used it for the brad you see laying in the picture with the slide. Patty also posted a newer tip on this, she used a Sharpie to color in the brad. This is actually for a class I am taking as part of our homework.
http://pattystamps.typepad.com/pattys_stamping_spot/2008/03/oh-too-cute-col.html
