Latent Image Regression with ILFORD PAN-F ----

[pentaxpete]

i have had lots of film sent to me by a fellow member of the Pentax User Site which had been in his loft UNDEVELOPED for YEARS !
I managed to get good results on AGFA APX 100 using Liquid PROMICROL 1+14 for 12 mins BUT all his 3 cassettes of ILFORD PAN-F + were BLANK -- I tried ONE first in the Promicrol - BLANK -- then second one tried I HOUR Stand in RODINAL -- BLANK -- then tried Crawley's FX-4 Formula 1+3 for 40 mins when usually 11 mins is good for PAN-F --- BLANK !! Even the factory fogged Edge Signing has not developed which indicates a severe case of Latent Image Regression. Have other members of this Group had this problem ?

 

[Asha]

I don't know if what I experienced a number of years back relates to a similar cause or not tbh.

iirc it was rollie film (120) of some sort that had several latent images on the roll and had then been left in camera unused for several months.

When the roll was finished and developed, the most recent images were fine, however the latent ones from approx six months previous had a severe mottling effect on the emulsion, rendering them useless.

Obviously this particular case was much less severe than what you have experience but bear in mind the duration of time between exposure and development was relatively short.

I no longer have the negs, nor the scans to show the results although they will possibly be here on TP somewhere ( dating back to about 2014 iirc)

 

[john.margetts]

Ilford Pan f is notorious for this. I have heard that noticeable image loss can happen in very few weeks.