Just a note about bromide in developers.
As the level of bromide goes up, edge effects are repressed, and so with enough bromide you can reduce sharpness substantially. Reducing alkali, as long as pH can be maintained, will increase edge effects somewhat.
Like all "rules", these are generalizations that should be tested. People state that contrast is good, but give no proof that sharpness or grain are maintained and etc...
You know, there is a "theory of developer design" for engineers. Maybe someday I should teach it.
I am sure that would the most popular thread around,
excluding the joke thread.
It was reported that glycin does not dissolve in propylene glycol (to make long lasting 2-part developers) but only in TEA. However I made this experiment: 2g glycin, 6ml TEA, 1tsp water,on heating gently and stirring this formed a clear solution which dissolved in 14 ml propylene glycol.The solution is only a few days old so it is not known if it is stable.
Heating these organic solutions cannot be made completely risk free IMO.
I've merged two threads on Ansco 130 for film into this thread--
There is another thread on Ansco 130 as a split developer, and the search engine will also turn up threads on Agfa 8 and Kodak D-78.
FWIW, that Morgan and Morgan darkroom book, I have also found, has a considerable number of typos and other errors in its formulary. I packed it away years ago rather than rely on it.
Yes, I'll dig out some photos developed semi-stand in diluted Ansco 130 and post them. I'll post some Agfa-8 examples as well.
Originally Posted by Trask
Thanks -- I'm particularly interested in these two developers.
Hi Trask. Can you give names for those formulae, and can you pass on title and publisher etc for the books you found them in?
Originally Posted by Trask
They come from two books:
La Pratique du Developpement by A.H. Cuisinier, Publications Photo-Cinema Paul Montel, Paris, 1966 (thirteenth edition)
Developpement Negatifs - Noir et Blanc by Jacques Prioleaud, Publications Photo-Cinema Paul Montel, Paris, 1980 (sixth edition)
Until writing this response forced me to look, I hadn't realized these were published by the same publisher. I bought both, I think, at a quasi-used book store in Brussels a few years ago.
Developer #1 has no name, is just said to be "an excellent compensating developer"
Developer #2 and #3 have no names in particular, are just sourced to Ilford. FYI, it's stated the the pH of #3 is 9.3.
I like these older books, especially the one from 1966. It's got a formula in it that includes potassium metabisulphite, hydroquinone, phenidone, sodium sulphite, ammonium chloride, boric acid, potassium bromide, acetone and benzotriazole. I think I'd have to by stock in Photographer's Formulary before I bought all that stuff!
I once studied chemistry - in high school... :) I have no clue what these different formulas do. I just use the chemicals.
Ansco 130 (from Photographer's Formulary) really is a good developer for film. I've done nearly twenty 5x7 sheets in it, and it gives me great negatives to print. I've used 1+4 and 1+8 so far. I like 1+8 best as highlights seem to print easier.