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Developing B&W film

Posted: Tue Jun 05, 2018 2:52 pm
by Ornello
A useful item:

http://imaging.kodakalaris.com/sites/ua ... y/z133.pdf

Most important:

"0.58 is the contrast-index aim for printing negatives with a diffusion enlarger; use 0.43 if you will print negatives with a condenser enlarger."

Re: Developing B&W film

Posted: Fri Jun 08, 2018 11:59 am
by pirateoversixty
ornello:
my eyes glazed over before I finished the article, but aren't these procedures geared more for the lab(commercial) people? I'm sorry, maybe I zonked out before I got to the part about condenser/diffusion enlargers. also, I have not seen test strips for amateur bw use before.
jim

Re: Developing B&W film

Posted: Fri Jun 08, 2018 1:50 pm
by Ornello
pirateoversixty wrote:
Fri Jun 08, 2018 11:59 am
ornello:
my eyes glazed over before I finished the article, but aren't these procedures geared more for the lab(commercial) people? I'm sorry, maybe I zonked out before I got to the part about condenser/diffusion enlargers. also, I have not seen test strips for amateur bw use before.
jim
Well, I don't know if Kodak still sells them. My point in posting this was to show that Kodak recommends less development for condenser enlargers. What's odd is that no further information is provided. What grade of paper? What lens? What brand of enlarger? All of these can affect contrast.

Re: Developing B&W film

Posted: Thu Mar 21, 2019 11:14 am
by Yak_Forger
That's one of the reasons to think it was mostly aimed at shops rather than at individual users: the owner of said shop will have to develop lots of different types of film, and should be able to adapt Kodak's general instructions to everything they are tasked to develop.