Here’s a viable alternative to barbarism.
Rather than ruin a perfectly good negative carrier, simply make a temporary one of mat board or thinner card stock. I do this all the time with old roll films of sizes not made in 40 years or longer.
If you need to keep a negative critically flat in a glass carrier, that too is easy. I’d choose a larger carrier, say 6 x 9 cm or 4” x 5” and cut an oversized-window mask from a piece of scrap FB print. The window is easily cut with a single-edged safety-razor blade. Lay the window mask centered over the negative and close the carrier. The glass carrier will keep the negative flat and you’ll project the jagged black edges you want without permanently ruining a good carrier.
You can also experiment with differnt size borders by making masks of different opening sizes.
Last edited by Ian C; 11-04-2012 at 10:12 AM. Click to view previous post history.