Please help FP4 and Rodinal.

[Guest]

I have some FP4 120 roll film rated at 80ASA. Could someone give me an idea of a processing set up of dilution and times please. Just going to do one at a time, 490ml of water with 10ml of rodinal but what time should I go for.
Cheers,
James.

 

[Chriscrawfordphoto]

Rodinal 1+50, 68 degrees (20C), 13 minutes. I expose it at EI-100, but if you've shot it at 80, you'll be ok, its just 1/3 stop difference. I agitate first 30 seconds, then two inversions of the tank every 30 seconds.

Note that 1+50 is 500ml of water with 10ml of Rodinal added. Its 1 plus 50, not one out of 50.

These were both developed that way, and are 120 size FP4 Plus.

 

[Chriscrawfordphoto]

My time is less than Ilford's recommended 15 minutes, but I think that gives too much contrast.

FP4 is a great film because it looks good in many developers. I've used it in Rodinal 1+50, D-76 1+1, and PMK. My favorite is PMK, but its a hard developer to use for a beginner and the results in Rodinal or D-76 are beautiful too.

 

[Guest]

So you turn the tank four times every minute, if so are they gentle or just a good tip over and then back.
Cheers,
James.

 

[Chriscrawfordphoto]

I invert it and turn it back upright pretty quickly then bang the bottom of the tank on the palm of my hand twice to knock off air bubbles that form on film. I do this constantly for the first 30 seconds, then two times every 30 seconds during the rest of the time. It takes 4-5 seconds to do two of these inversion cycles.

 

[gsgary]

This is FP4 120 @ 100 rodinal 1+25 for 9 minutes agitate first 30 secs then 3 every minute

 

[Sejanus.Aelianus]

One alternative is Rodinal 1+100, three gentle inversions to distribute the chemistry evenly plus a tap to remove the bubbles, then develop without inversion for 1 hour or so.

This has worked for me, albeit with 35mm film.

 

[tycho]

Chris, I have always read 1+1 for 500ml as 250ml dev / 250ml water. Or as the example 1+50 for 500ml is 10ml dev / 490ml water. If it was 510ml total, the dev would not fit in my tank. Or am I reading that wrong?

 

[Photo_Smith]

I wouldn't worry FP4 is a wonderfully flexible film and works well with Rodinal, if it was a sunny day then overexposing slightly and reducing developer times from recommended and you should be OK.
From memory I rated this at EI 100

Developed in Rodinal 1:50 20% less than the Agfa times with 30 seconds agitation and one gentle inversion per min after that.

 

[Fotohuis]

1+50 means 1 part developer and 50 parts water. So to be exactly if your content of the tank is 500ml:
500/(1+50), or 510/(1+50) which means 10ml Rodinal/R09 concentrate. 510ml will fit in every 500ml film tank.

FP4+ and Rodinal is an average good combination. ID11 is a better choice and if you minimize the costs Fomadon W27 from Foton/Foma is the same receipt.

 

[tycho]

Fotohuis, is 1+100 / 500ml of water with 100ml of Rodinal? Not trying to be snarky, just confused.

 

[Mackinaw]

Fotohuis, is 1+100 / 500ml of water with 100ml of Rodinal? Not trying to be snarky, just confused.

No. 1+100 would be 5ml of Rodinal and 500mm of water.

Jim B.

 

[tycho]

Bad at math there, thank you Mackinaw.

 

[Fotohuis]

All in the same way:
1+100 means one part Rodinal and 100 parts of water.

With a 500 ml tank:
500/(1+100) amount Rodinal.

The deviation of 5ml concentrate Rodinal is neglectible. The minimum amount of Rodinal for each 135-36 or 120 roll film ( same area) is around 5ml.

 

[Johnmcd]

FP4 and Rodinal 1:50 15mins @ 20 degrees C. Start with 10 sec of inversions, tap to release any bubbles, then 4 inversions every minute.

Great combination.