----- Original Message ----- From: Janet Cull To: pure-silver@xxxxxxxxxxxxx Sent: Sunday, September 24, 2006 6:25 PM Subject: [pure-silver] short dev. times/to Jim and Bob >>>In the middle of your test roll, take the back off of the camera, pull the dark slide out, and make sure that you see the film in there. When you develop the roll, regardless of how you have exposed the rest of the roll, that frame should come out black.<<< Mark, What is the purpose of that? What will it tell me? Thanks for replying. Janet It will tell you whether you development is at least adequate. White light exposed film should develop to a black denisty. If it comes out less than full density, you know the problem is in your development, not the camera which as this thread drags on appears to be less likely the problem.