Thin FP4+ Negative

[tron_]

Processed some large format (4x5) Ilford FP4 using a 1+4 dilution of Ilford DD-X. Negatives came out extremely thin despite ensuring the chemicals were mixed 100% correctly. Here were the steps taken (everything at exactly 20C):

-Prewash for 2:00
-Developer (100ml DD-X + 400ml water) for 10:00
-Stop bath
-Ilford Rapid Fixer for 5:30
-Wash for 10:00
-Photo Flo for 1:00

Gross underexposure? There are a few areas of the film that are very thick (i.e. appear black on the negative) close to where the dark slide inserts into the film holder. I can post scans tomorrow but wanted to put this here just in case.

FWIW the Acros that was processed with this turned out great.

 

[tron_]

Thank you for the response. This was processed in a temperature controlled Jobo CPA2 processor and everything including the water baths were at 20C.

 

[darkosaric]

Do you remember the exposure you used (f stop - shutter speed)? Indoors, outdoor...?

 

[Mike Crawford]

Film loaded in the slide the wrong way so shot through the back instead? We've all done it!