Foma Pan 400 ASA fog on film???

[DeletedAcct1]

FomaPan 400asa-up to 1600asa
DEV. Selectol soft 1:7 mixed with Multigrade [Ilford] 1:4
in a compact tank 750ml 2 120 rolls on one reel.
temp 32-degres for 10.5 min with agitation + a sitting bath 9min [water]
here the two rolls came out the same

#271 is a scan as is

#264 was the roll just before
FomaPan 400asa-up to 1600asa
DEV. Selectol soft 1:7 mixed with Multigrade [Ilford] 1:4
in a compact tank 750ml 120 rolls on one reel.
temp 27-degres for 8.5 min with agitation + a sitting bath 9min [water]
it came out perfect [well almost]

must add if the film was transferred in the summer time from warehouse to store in summer here in Athens by means of some motorcycle, and was exposed to the sun - that means a heat index of 90-degrees that could f%^& up the film !!

Lemme understand. Are you blaming a film for massive fog where you use strange concotion of paper developers, pushed film and stored and exposed to the sun?
Wow!

 

[Bill Burk]

Both are Fomapan 200 still hanging to dry. There is nothing blue in the base. On the other hand, the anti-halation dye has an incredibly vivid bright green color - a joy to the eye

Anyone want to say what the base density of Fomapan 200 is after processing? Their document might be talking about the dye that washes out.

I can trust that antihalation dye might wash out, I watch the water bath of TMY2 go from bright magenta/pink to clear in about four changes of water.

Example Kodak is about 0.05 base density while many of their 35mm films have 0.24 density that is permanent gray base.

That’s about 2/3 stop. Enough that you might want to knock a few seconds off contact printing times for 120 size negatives versus 35mm.

 

[Bill Burk]

Lemme understand. Are you blaming a film for massive fog where you use strange concotion of paper developers, pushed film and stored and exposed to the sun?
Wow!

Nobody knows. The motorcycle could have made the run from warehouse to store overnight.

 

[Light Capture]

FomaPan 400asa-up to 1600asa
DEV. Selectol soft 1:7 mixed with Multigrade [Ilford] 1:4
in a compact tank 750ml 2 120 rolls on one reel.
temp 32-degres for 10.5 min with agitation + a sitting bath 9min [water]
here the two rolls came out the same

#271 is a scan as is

#264 was the roll just before
FomaPan 400asa-up to 1600asa
DEV. Selectol soft 1:7 mixed with Multigrade [Ilford] 1:4
in a compact tank 750ml 120 rolls on one reel.
temp 27-degres for 8.5 min with agitation + a sitting bath 9min [water]
it came out perfect [well almost]

must add if the film was transferred in the summer time from warehouse to store in summer here in Athens by means of some motorcycle, and was exposed to the sun - that means a heat index of 90-degrees that could f%^& up the film !!

https://www.foma.cz/en/fomapan-400 - Fomapan 400 datasheet

Minimum density varies greatly with developing temperature for Foma 400.
Second page shows densities for several developers at 30 degrees beside graphs for 20 degrees.
High temperature graph is at severe disadvantage due to very high min density and lowered max density.
Xtol and Fomadon Excel at 20 degrees will make it comparable to other film stocks while less common developers according to datasheet cause increased min density.

According to the graphs, min density tops at almost 0.5 for some developers at 5 minute mark for 30 degree graph. That value is surpassing by quite a bit min density of 11 minute developing time at 20 degree graph.

That reminds me of a thread from a year or two ago with Shanghai developed in non standard developer and having some serious issues that cleaned up in more standard chemistry.
Most of the time classic emulsions need to be developed carefully for repeatable results. Even more modern ones benefit from tight processing parameters.

 

[Bill Burk]

Thanks @Light Capture the sheet explais the 120 base is clear with anti halation dye that washes out. Probably will give close to 0.05 densitometer reading. Like most 120 film, most are clear.

 

[joho]

Nobody knows. The motorcycle could have made the run from warehouse to store overnight.

Lemme understand. Are you blaming a film for massive fog where you use strange concotion of paper developers, pushed film and stored and exposed to the sun?
Wow!

It is the film ! and the issue is the paper backing of the 120 roll- there us a pre-rinse where the dye is washed out-the high temp is due to the room temp is 32-to-36 Celsius summer time. now the temp is down to 27Celsiusthis is not a problem...
3 films 400asa was the problem, out of 30rolls...

 

[DeletedAcct1]

It is the film ! and the issue is the paper backing of the 120 roll- there us a pre-rinse where the dye is washed out-the high temp is due to the room temp is 32-to-36 Celsius summer time. now the temp is down to 27Celsiusthis is not a problem...
3 films 400asa was the problem, out of 30rolls...

Fog is a thing, the backing paper is another issue. You were talking about massive fog at the opening of this topic as I see it...
As @Light Capture has clearly stated, fog gets high with higher developing temperatures.
I'd suggest you to not expose the film to direct sun or high temperatures, not to use strange paper developer concotions, use Kodak Xtol next time and I'm sure Fomapan 400 will be developed wonderfully. It's not the film the problem (except for the backing paper issue, but this problem was fixed by Foma).