… my "darkroom" box from storage, where it's been for the past 25 years, after residing in the garage since the early 1980s. I expected to find trays, tongs, a one-reel developing tank, speed easel, and enlarger lenses and negative carriers. Unexpected was my bulk film loader with some remaining quantity of Ilford HP4 and a half dozen or so reusable cassettes.
Atypically for me, I had the foresight to note the film type in the loader; more typically, I neglected to note the date I put it in the loader. Looking through my archive, it appears that the last roll of HP4 that I shot was in December 1976.
So . . . 40+ years at minus one stop per decade, I'm assuming I should rate the test roll at ISO 50 baseline, then bracket in half-stops plus and minus two stops from there. Any recommendations on developer?