Pixophrenic
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Hello there,
I used to lurk on this thread for a while and the recommendation of the 1972 book by Jacobson and Jacobson was just the thing I was looking for, that is, not a "cookbook", but a more in-depth understanding of film development. Was there any book taking a similar approach to the one of Jacobsons' published since their 18th edition in 1972? Despite a lot of useful advice and a rational approach to developer composition, the Jacobsons' book seems seriously outdated as it does not cover modern hardened emulsions, and especially, the C-41 and E-6 chemistries. Thank you very much for the info.
maybe ... the darkroom cookbook
The Haist book is hard to get, and it is equally hard to believe that nothing new was introduced since 1979. I understand that there is quite a lot of legacy stuff in actual use, starting with the popularity of pyrogallol, but I am confused especially in quite a few points with regard to developers (more on films later). First, how does one arrive at mixtures of two or more developing agents in the same developer (i.e. Rollei Supergrain, Moersch Finol etc). Second, what is the point in using two buffering substances, like borax and carbonate, in the same developer? And third, many one-solution formulations of Crawley contain both sulfite and bisulphite (and carbonate). What is the point since carbonate neutralizes bisulfite and gives more sulfite? Of the FXs, especially confusing is the FX-55. Two-part concentrates are a different matter, as it is believed that keeping pH down helps extend shelf life. But FX-55 is a concentrate without any unstable substances! Then again, why not titrate sulfite down to pH 6 with acetic or boric acid? Are these questions answered by Haist?Use the book by Haist. It is by far the best and most accurate explaining what is going on. Behind that is Mees and James.
PE
Well, to start with you are right. There are no books more recent than Haist's book that are equal to or better than that book in explaining what is going on.
However, to make a point here, and to paraphrase Haist, he indicates that any developing solution with more than 2 developing agents has been improperly designed. In other words, two are enough. In my experience, he is right.
Crawley's work is generally obsolete, having been done with older emulsions. They often do not work the same with modern high Iodide emulsions. In addition, the chemistry is just awkward, as you point out.
PE
Most is in the Darkroom Cookbook was appropriated from other sources.
I am looking to get a rationale to choose between the existing developers and BW films, and for some history, which includes understanding that what was good 50-70 years ago, may not hold. On a practical side, if I had to send a film for processing and the lab told me what they use, I'd have an educated guess what I get back. That some modern films "do quite well" in D-76, may not necessarily mean they show their best. If this is so, current cookbooks recommending D-23, Beutler, Steckler and such, may generally be doing a disservice.i didnt' realize the OP was looking for material published by the original authors
i thought an "anthology of formulae" would be OK.
OP strike my suggestion !
Thank you very much, PE. Now I am getting somewhere. May I ask what is your opinion on using traditionally "color" developing agents like CD-3 in BW developers?Well, to start with you are right. There are no books more recent than Haist's book that are equal to or better than that book in explaining what is going on.
However, to make a point here, and to paraphrase Haist, he indicates that any developing solution with more than 2 developing agents has been improperly designed. In other words, two are enough. In my experience, he is right.
Crawley's work is generally obsolete, having been done with older emulsions. They often do not work the same with modern high Iodide emulsions. In addition, the chemistry is just awkward, as you point out.
PE
All Kodak films were released for sale by passing a D76 release test. If they failed, they were not sold!
As for the Crawley formulas, one example are those with Iodide. They are said to improve sharpness, but in modern films show (for the most part) no advantage. The early films that Crawley used were either pure Bromide or had buried Iodide. Therefore, addition of Iodide to the developer caused instant adsorption of Iodide on the surface, and then release as development took place thus giving edge effects. Today, a 10% Iodide emulsion swamps that effect to render its own edge effects and thus you see no significant improvement.
There have been discussions about this a while back on APUG.
PE
What would the keywords for a search to locate these discussions be? With "iodide" I am getting nowhere. Thank you.All Kodak films were released for sale by passing a D76 release test. If they failed, they were not sold!
As for the Crawley formulas, one example are those with Iodide. They are said to improve sharpness, but in modern films show (for the most part) no advantage. The early films that Crawley used were either pure Bromide or had buried Iodide. Therefore, addition of Iodide to the developer caused instant adsorption of Iodide on the surface, and then release as development took place thus giving edge effects. Today, a 10% Iodide emulsion swamps that effect to render its own edge effects and thus you see no significant improvement.
There have been discussions about this a while back on APUG.
PE
The Darkroom Cookbook 3rd or 4th edition is the best option, earlier versions contain too many erros all originating from the highly flawed Photo Lab Index publications which were riddled with errors. I'd add that the Lab Index errors were perpetuated in a great many US publications.
The DCB 3rd ed Formulae wre cross checked with primary source, the manufactuers own data.
Ian
I am looking to get a rationale to choose between the existing developers and BW films, and for some history, which includes understanding that what was good 50-70 years ago, may not hold. On a practical side, if I had to send a film for processing and the lab told me what they use, I'd have an educated guess what I get back. That some modern films "do quite well" in D-76, may not necessarily mean they show their best. If this is so, current cookbooks recommending D-23, Beutler, Steckler and such, may generally be doing a disservice.
Crawley revised his formulas over the years. Some of the ones optimised for Perutz films, for example, were dropped.
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