A combination of factors. I like D-23 and some of the divided developers, none of which are available locally. I also enjoy using Beutler with Foma 200, again not available locally. I also like the idea of avoiding dependence on major manufacturers - Kodak, for instance - who have not demonstrated any loyalty to those of us who enjoy black and white processing and printing.
You have had a fair amount of responses here.
The thing that puzzles me is why did you want to know? What are you going to do with the data?
Maybe add more recipes to the third edition of "Way Beyond Monochrome"?
“Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”
Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2
I neglected to answer the bit about my favorite formula. I always make dual sheets so I have a backup and some darkroom options. For film, my pecking order is : first for all films, Germain's Finegrain (can't buy it). For T grain film and ir, my second choice is Fx37 (can't buy it), For TriX, FP4, HP5, and most old fashioned emulsions, a Rodinal clone I call Ianol (can't buy it). I also keep D76H and Pyrocat MC on hand as additional variables. I use Ilford WtFb for printing and my paper developer is a cool tone Ansco 130 which has some variations (can't buy it).
Happily, this has let me try a huge variety of other chemical approaches rather than speculate or rely on forum posts for information..hate not to really know things first hand..
I happen to have a 40s-era darkroom handbook with formulary. Agfa 47/130 [and a lot in between; in later contexts you may see this being referred to as Ansco 47...it was published just before the Second World War started], Kodak D76/DK50/D52/D72, some Gevaert formulas, and others by companies that no longer exist [what's Haloid?] and still others compounded by the author himself! Haven't bothered to compound any of the formulas yet, but I may just wake up one day and place an order for some of these raw chemicals It also has formulas for certain other chemicals [uranium toner, anyone?] The only problem is......a lot of the units are denominated in grains.....don't think there is a modern scale that measures so accurately....
I mix from scratch:
Pyro-HD King formula, because it is hard to find in Europe (perhaps in Vienna at Lotus) but absolutely not in Belgium.
E-72 (= Hydrochinon free Dektol) because it does not exist commercially.
Buffered stop bath because it does not exist commercially in Europe.
And, last but not least, I like doing it!
Last edited by Philippe-Georges; 01-03-2013 at 12:37 PM. Click to view previous post history.
"...If you can not stand the rustle of the leafs, then do not go in to the woods..."
(freely translated quote by Guido Gezelle)
PS: English is only my third language, please do forgive me my sloppy grammar...