Quote Originally Posted by Bruce Robbins View Post
Order of events doesn't matter. It's probably easier, though, to pre-flash and then make the print.
I've been using a square piece of frosted glass just below the lens. Of course, most of the light is absorbed (no negative detail passes through) so there's no need to take the negative out. I can also stick appropriately cut pieces of card on the top side of the glass to flash selected areas - something you wouldn't be able to do with pre-flashing.