The colour is due, among other things, to antihalation dyes, which differ between backing paper backed 120 and cassette stored 135 film - so the difference in colour isn't unusual.A 135 and a 120 of Fomapan 200 in Fomadon R09 with 1:50 dilution, 10 mins @20C
I am new to this and got odd results. Both films shot on the same day, Both developed on the same day, same chemistry, same tank inversion scheme etc.
120 film developer came out green. Negatives lacking contrast.
135 film developer came out same colour as what went in and good contrast to negs.
It is as if the 120 and 135 are different films.
The 120 has a green antihalation dye. This washes out with the developer (most of it in any case), which explains the green color.
Both emulsions are the same, so if the 120 was less contrasty, development was not identical to the 135. What tank did you use, how much developer (volume) and which agitation pattern? And was the developer temperature the same in both instances?
The colour is due, among other things, to antihalation dyes, which differ between backing paper backed 120 and cassette stored 135 film - so the difference in colour isn't unusual.
I'm assuming the films were shot in different cameras with different lenses and different shutters. If so, there are numerous other potential sources for the differences.
Have you observed much more consistent results with other films of two different formats?
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