Phillip P. Dimor
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Old guys sometimes do know a few things after all.
I'm not familiar with DD-76 could you explain the DD part? There is an FDD-76 which I believe is Photographers Formulary version.
Thanks,
end snipDivided D76 is basically D76, but the developer and accelerator are kept separate in an A and B bath. Basically a 2-bath developer.
I am not sure what "ripening " means. I'll assume it is the changes that take place with use. Seasoning is another common name.
The primary differences between fresh developer and seasoned is the accumulation of by-products. Typically bromide, oxidized developing agents, soluble sensitizing dyes and other materials from the film/developer interaction. The largest influence is the build up of bromide that is a development restrainer causing a loss in speed and contrast. This is easily compensated for in exposure and development time.
Properly replenished developers can give excellent performance if the developer is used frequently. However, for infrequent use (less than once a week) and when seeking the most consistent results I have found one-time use is a better practice.
In all cases, when no being used it is critical to store the solution in clean GLASS bottles. . . . .
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