08 Nov 2011
WOW! Thanks for the input, and clarification about Agfa. I have and account at Freestyle Photo, and they have been quite reliable. I will give them a "look see" to see what they have.
I began to look at Rodinal for a couple of reasons: (1) I have heard a lot of talk about how good the developer is, so I should gather some data myself, (2) I had a small bottle of Rodinal to experiment with, and (3) I am trying to "tame the grain" of Delta 400.
Delta 400? What size negative to what size print? It's grainier than TMY but less so than other 400 films I'm familiar with and, in any case, Rodinal is probably not your developer to "tame grain." If Delta 400 is too grainy and you need 400 speed try TMY-2. If that's too grainy you need a bigger negative.
Dr Momme Andresen (of Agfa) who discovered the developing agent p-Aminophenol and frormulated Rodinal published a one shot developer in the german publication "Agfa Photo-Handbuch" in the very early 1900's and while it's close it isn't Rodinal as it uses p-Aminophenol Hydrochloride. Agafa publications of the same era stress it uses the free base. This is a bit complex to make at home and wasn't then commercially available.
Modern Rodinal from Agfa contains a surfactant with anti-oxidant/anti-foggant properties, (these are in a 1930's German Patent). In addition the Agfa Rodinal made from the mid 1960's also contains Potassium Bromide.
There will be differences in how the early Andresen p-Amininohenol hydrochoride one shot developer your using works and Calbe's current RO9 and also Agfa's later new version sold now as adolux etc. Those differences may be subtle and harder to spot with many of todays emulsions, keeping properties may be quite different as well.
Todays films have a greater inherrent sharpness and fineness of grain which is less affected by choice of dveloper than in the past.
APX 100 / Rollei Retro 100 and Fomapan 100 are perfect matches in Rodinal (1+50, regular dilution). Also Efke 25-50 are good combinations although Beutler or FX-1 or Tetenal Neofin Blue are just superieur for Efke. These films like a very high acutance type developer.
I have a bottle of Agfa Rodinal which may be 4 years old. When I reorder a replacement, what is the equivalent?
John's business went under due to bad business practices and the like. I'm sure there's something around somewhere about the actual name Rodinal?.