I am preparing to take on a couple of processes that require a density range of 1.8-2 or more. Initially, I will just be using HC110B as I do with my negs meant for silver printing.
As I understand it, if I provide the N+2 development time to a negative with N SBR range, I should be in the ballpark for the desired density range. I don't have N+2 times calculated but I am assuming it'll be about 1.7x to 2x the N development time. i.e. N(alt)=N+2(silver).
So for a scene that actually needs N+1 etc development my time to get an alt. neg has to be even more. If this understanding is correct, then I am a little confused about the following sentence from the .alternativephotography.com site:
"I followed the usual procedure for making the negatives: Ilford FP4 plus film, overexpose by one stop then overdevelop in Ilford ID11 by 80%."Why overexpose by a stop? If anything N+2 negs are underexposed by a third or even half of a stop, aren't they? N- negs need to be overexposed to boost the shadows. What am I missing? Any tips on making in camera negs that have a high DR would be appreciated.