Just the facts, ma’am.
One is that there are research chemists employed by photo companies who are happy to tow the corporate line and not make any waves. Another is that there are, or were, many talented chemists who have developed wonderful formulae like FA-1027, but who were stonewalled by upper management; being told such developers, however good, would cut into the sales of D-76, and weaken it’s market appeal. Still another reason is that many chemists, knowing the effects developers have on film emulsions, are not very keen on the finer differences between, for example, distinct local contrast in high values, and high value compression – in an aesthetic sense. In other words, tone-blind. It’s a slide-rule mentality.
What type of description of film (and developer) performance do you find most useful in your work?
As soon as marketing a product involves contriving conspiracy theories to put generations of engineers in a bad light, I'm out. What a piece of godawful codswallop that is.
word salad
I google a bit on this developer and hit upon this pdf apparently published by Fine Art: https://www.argentix.ca/specs/591.pdf
The author goes into the question why such a great developer wouldn't have been introduced earlier by a major manufacturer. Here's what they have to say about the reasons:
As soon as marketing a product involves contriving conspiracy theories to put generations of engineers in a bad light, I'm out. What a piece of godawful codswallop that is. The entire piece, btw. It starts off reasonably alright, but devolves into a highly annoying flavor of quasi-poetic, self-absorbed and naïve arrogance. It's undoubtedly written by the same hand that wrote the equally ridiculous 'product description' quoted in the first post.
I like this a lot, too. It's a simple but effective look at the data.One of the best ways is a chart like this
I like this a lot, too. It's a simple but effective look at the data.
I also think that a family of characteristic curves can help, though it is only one look at the data and should be followed by additional testing, especially with a final product in mind. Here's a quick look at Delta 100 in different developers.
View attachment 328419
Interesting curves.
A few non-rigorous impressions:
XTOL and F-76, S-curve, especially for F-76
D-76, quite linear, short toe
HC-110, long toe followed by linear
R09, long toe followed by linear, slightly less film speed as indicated by delay in toe toward more exposure.
Any thoughts?
Of the one tenth remaining half is camera handling, film exposure, and film processing. This part is easy to get right with some practice and conscientious attention to detail.
It's like flying a helicopter - usually very routine but a bad mistake spells disaster.
So true.The documentation goes on and on in some detail along the same lines. I find the description confusing. It reads a bit like a word salad, devoid of useful information. I have found similar prose in photography textbooks and magazines over the years.
I prefer articles which are a mix of carefully chosen words and photo examples - articles aimed more at practical results than technical theory. A few curves can be useful, but I cannot live by curves alone. And please! every graph, table and chart should have clearly labeled x and y-axes, column and row headings, units for all numbers, and there should be a key for anything represented by color or different graph line styles!What type of description of film (and developer) performance do you find most useful in your work? Could you give an example of an account that you enjoyed reading and learning from?
One of the best ways is a chart like this
View attachment 328399
Speaking selfishly for myself, what I want to learn from the stupendous amount of work you are doing and generously sharing is not detailed guidance on how to turn subject brightness x into print tone y, but a broad understanding of how film choice and development affect the overall tonality of the image. In other words, could I improve on my current favourites, given the type of subjects I like to photograph?
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