Larry Kalajainen
14-Jan-2006, 15:41
For years, I've happily used Delta 400 sheet film and developed it in my Phenidone/Metaborate/Ascorbic Acid homebrew. (Similar to Pat Gainer's concoctions). Developing time was 6'30" at 70.
Alas, Ilford isn't making Delta 400 in sheets any more, so I'm trying HP5+. I ran some film speed tests yesterday and took a "guesstimate" at 7'30" at 70, and it's as though I didn't expose the film at all. Completely clear.
I'm guessing that the development time must be longer, but does anyone have a good guess as to how much longer? I don't care for long developing times, so I may need to use my higher energy formula which substitutes carbonate for the metaborate, as I do for Fuji ACROS.
Cheers,
Larry
Alas, Ilford isn't making Delta 400 in sheets any more, so I'm trying HP5+. I ran some film speed tests yesterday and took a "guesstimate" at 7'30" at 70, and it's as though I didn't expose the film at all. Completely clear.
I'm guessing that the development time must be longer, but does anyone have a good guess as to how much longer? I don't care for long developing times, so I may need to use my higher energy formula which substitutes carbonate for the metaborate, as I do for Fuji ACROS.
Cheers,
Larry