Thanks you all. Gainer, I wasn’t after an increase in contrast, but trying a process I’d read about here that was said to be suitable for soft lighting. ie: Extending development time with reduced agitation to retain shadow detail and not block the hilights. I’m happy with the resulting negs although I’ll know more after the weekend when I’ve tried to print from them. I just wondered if anyone else had used HP5 and Rodinal the same way and experienced a raised base fog level.
Lee, interesting that you had the same experience in the same condititions, were your negs printable?