Help with experimental roll (FP4+ underexposed at 2000)

[Colden]

Please help with developing an experimental roll of Ilford FP4+ 35mm film, underexposed by 4 stops (ISO set to 2000). I decided to use Xtol 1:1 to soup this roll. The times quoted below are from the Massive Dev Chart.

Here we go:

Xtol 1:1 @ 20*C (FP4+ underexposed 4 stops [ISO 2000])

ISO	Time		Increment	Source
------------------------------------------------
64	8.5		-		Chart
125	10		+1.5		Chart
250	12		+2.0		Chart
500	14.5		+2.5		Chart
1000	17.5		+3.0		Chart
2000	21		+3.5		Guessing
2000	21.5		+4.0		Guessing
------------------------------------------------

As you can see, I am guessing with ISO 2000 because the Dev Chart only goes to ISO 1000. It increments the time (see "Increment") in a certain pattern that makes me conclude that ISO 2000 would be best souped for either 21 or 21.5 minutes, but I also realize that such severe underexposure may require a radically longer development time and non-standard agitation technique.

I will appreciate your thoughts and comments on this.

 

[Chaska]

I was able to salvage a roll shot at 1250 with microphen for about 17 minutes. I think it was undiluted, check the FP4 info on the ilford site, it should give the details.

 

[Jadedoto]

Good luck, I shot a roll at 1600 and tried to salvage it in xtol, and it hardly worked. I think I underdeveloped it- I could hardly enlarge it without the shadows compressing to a solid black.

 

[AgCl4ever]

Good luck, I shot a roll at 1600 and tried to salvage it in xtol, and it hardly worked. I think I underdeveloped it- I could hardly enlarge it without the shadows compressing to a solid black.

You are talking Major Push. Rodinal, 1:100, agitate every 30 sec. for 5 sec for 5 min, then let sit (yes, that is sit) with no agitation for 60 min, drain, stop, fix as usual.

 

[Jim Noel]

XTOL is definitely the wrong developer for this job, You need something more active.

 

[pentaxuser]

I know this is taking without giving as I can't help with the information you need but I am curious as to what has decided you to attempt this as an experiment and what you think may emerge. I hope this doesn't sound like a put-down. It isn't meant to be. Just genuine curiosity.

pentaxuser

 

[poutnik]

I would agree with AgCl4ever, try (semi-)stand development in dilluted Rodinal.

(I've shot HP5+ at 3200, developed in R09 1:40 for 55 minutes with good results. Some people say R09 1:40 is equivalent to Rodinal 1:50, some disagree, but give a dilluted Rodinal a try)...