I have never come across a hinge stain that goes right through to the face of the stamp.
Even as a collector of used stamps only and mostly with hinges when
purchased I can not help you at all. I have had gum from hinges that will not come off and distort the shape of the stamp.This gum will not come off the stamp at all and has no colour to it what so ever.
Quote:
you might be looking at (gulp!) a Scotch Tape mark that bleeds through the stamp
I have never come across this nasty sounding problem.
KGV
