FX 37 dev times

[Geopadi2]

Hi,
I mixed the Formula for FX37 according to that found in The Darkroom Cookbook & The Film Developing Cookbook which are identical with each specifying 5ml of 1% Benzotriazole.
Due to a lack of published times for Fuji Acros 100 in either of the above books or the Massive Dev Chart or anywhere else I looked I based my time on other T grain emulsions.
Using 1 + 3 dilution as recommended, I developed the film for 8min @ 20C based on the times given for Tmax 100 and Delta 100.
I used continuous agitation for first minute then 3 inversions every minute thereafter, unfortunately the result was overdevelopment by a significant amount, not totally irretrievable but not good! I am guessing 6 min would be much nearer the time.
If anyone has a time for Acros 100 or a more definative list of film times for FX37 at either 1+3 or 1+5 dilution which I've seen for some films, I would be most grateful.

 

[Kevin Caulfield]

Just checked my records Five minutes worked for me.

 

[Kevin Caulfield]

Just checked my records Five minutes worked for me.

That's at 1+3.

 

[Geopadi2]

That's at 1+3.

Thanks for that Kevin I think that sounds a lot better!
Cheers

 

[Alan Johnson]

Crawley's recommendation in 2005 was 7 min for 1+3 at 20F, agitation 4 inversions per minute (post 10):
https://www.photrio.com/forum/threads/crawleys-fx-37-developer-for-t-max-delta-films.23457/
However in 2005 he did increase the times from his original 1996 recommendation by a minute or more for some films so it is not entirely clear which is best.

 

[Geopadi2]

Crawley's recommendation in 2005 was 7 min for 1+3 at 20F, agitation 4 inversions per minute (post 10):
https://www.photrio.com/forum/threads/crawleys-fx-37-developer-for-t-max-delta-films.23457/
However in 2005 he did increase the times from his original 1996 recommendation by a minute or more for some films so it is not entirely clear which is best.

Thanks Alan,
I read your comments in link very interesting. I now have 2 times for Tmax 400 of 8min and 7min and also 8min for Tmax 100. I don't think I will use FX 37 on the fast films due to previous remarks. More importantly I have another time for Acros 100 of 7mins, so given my experience I will give the next roll 6min and see how it compares with the overdeveloped 8min film.
BTW is agitation for whole fist minute advised or is less better?
Cheers

 

[Alan Johnson]

Hello George,
In Crawley's 1996 BJP article introducing FX-37 he says "... four small tank agitations per minute,starting on pouring."

 

[Geopadi2]

Hello George,
In Crawley's 1996 BJP article introducing FX-37 he says "... four small tank agitations per minute,starting on pouring."

Thanks again, that rules out the first minute then! probably contributed to the overdevelopment significantly then. On second thoughts I will try 7mins with this regime.
cheers