Choosing a developer

[Joao]

Question about choosing a developer:
I know a certain film "Brand XX" at ISO 50 develops well in developer A for 8 minutes and in developer B for 11 minutes.
And I know that a different film "Brand YY" at ISO 80 develops well in developer A for 8 minutes.
Can I assume that the Brand YY film will also develop well in developer B for 11 minutes?? Does this makes sense? Can I use this “logic” in choosing a developer I have not tried when the film speeds are not too different?? Or are there other factors involved ?
Thanks for your opinions
Joao

 

[rover]

Generally speaking any film can be developed in any developer. I think if you are starting your journey in processing film may want to stick to a couple similar films and one developer at a time to see how you like it and what results you can get by experimenting and changing your routine. Find that brand x film that you like and developer a that you read works well, and grow from there.

 

[BobYIL]

Your "logic" pratically is applicable for general cases; however sometimes film/developer conbinations may not be that "linear" to calculate. Additionally, especially pushing times are to be determined based on developer/concentration for each type of film separately. Instead of having to deal with density and contrast issues, I might recommend you to stick to the following chart for almost all available film & developer combinations.

http://www.digitaltruth.com/devchart.php

 

[haempe]

...
Can I assume that the Brand YY film will also develop well in developer B for 11 minutes?? Does this makes sense? Can I use this “logic” in choosing a developer I have not tried when the film speeds are not too different?? Or are there other factors involved ?
...

Depends... In the most cases, Yes. But not necessary.
It is a starting point for a test... not more.

 

[gb hill]

Just asking or do you have a developer in mind you wish to try? I see your logic of thinking & find it interesting.

 

[Joao]

I'm grateful for your answers.

I should have been more precise in my question.
I will re-phrase it:
Film Polypan F (ISO 50) develops well in Rodinal for 8 minutes and in Caffenol for 11 minutes. Film ORWO UN 54 (ISO 80) develops well in Rodinal for 8 minutes (samples im my Gallery). Should I expect good results with it in Caffenol for 11 minutes ??

Anyway, I am ready to try it - unless someone comes with a valid reason no to do it , or to do it otherwise.
Thanks again
Joao