Quote Originally Posted by c6h6o3 View Post
So if RPippin is getting overexposed prints at much shorter exposure times with a non-diffused 30 watt bulb, wouldn't you agree with me that his negatives are probably thinner than yours?
Yes, but if he simply exposes his negatives more without changing film development time, I don't think he'll see any difference in the prints' appearance, unless the original negatives were not off the film's toe. Otherwise, only his print exposure times will increase.

PS One difference in his prints might be that paper area outside the image is blacker. No impact on the low image values though.