Here’s an image made with the 1905 Seneca 4×5 camera. As you can see, the lack of light leaks from the lack of velvety light traps where the film holder meets the camera are an issue.
But also the film holders themselves might be to blame. The tape on the hinges was old and quite transparent. I’ve since replaced the tape with black Lineco Book Repair Tape.
‘What Light Makes Dark’
Camera: Seneca Chautauqua (c1905)
Film: Ilford Ortho Plus (x-06/2004); 100ISO
Process: Rodinal 1+100; 60min