Two films in a tank, only one comes out with a development error – why?





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I recently developed two 35mm films together in a tank. One, and only one of them, came out with these artefacts on most (but not all) of the exposures:



enter image description here



(Negative digitized using a digital camera; you can just about discern the film sprocket holes behind the improvised white mask.)



I'm new to film processing, having developed ~10 films so far; I have never encountered this problem before, but it looks to me like an agitation issue. The procedure was as follows:




  1. Loaded two 35mm films in a Jobo tank, one reel on top of the other. The films were Ilford FP4+ rated at EI64 and Fomapan 100 rated at EI100. The film with the problem is FP4+; Fomapan came out perfect. I don't remember which film was on top.

  2. Developed in 1:4 Ilfotec DD-X for 8 minutes in 20°C, following Ilford's recommended agitation routine (4 inversions spread out over 10 seconds every 1 minute), except that at one point I had a bit of a lapse of attention and there was 1½ minutes between two successive agitations (and then only ½ a minute before the next one).

  3. Stopped in Ilfostop.

  4. Fixed with 1:4 Ilford Rapid Fixer, 2 or 3 minutes.

  5. Washed using Ilford's "fill tank with water, invert n number of times, pour water out, repeat, repeat and repeat" method.


My specific questions:




  1. What caused this artefact, and why does it appear on one film only?

  2. Would the order in which the films were loaded have an effect? Is the damaged one more likely to have sat at the bottom or at the top?

  3. What can I do to avoid this sort of thing in the future?










share|improve this question







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  • The films were both exposed in the same camera, yes? With similar storage/handling before/after exposure? Any other differences between the films before you got to the point of starting development?

    – osullic
    12 hours ago






  • 1





    Now that you mention it, I do remember that when I opened one of the film canisters, the film seemed to be "sticking to itself" in a way I had never experienced before. I don't know if it was the FP4 or the Fomapan, but I suspect the first. I didn't think much of it at the time – just thought this was characteristic of this type of film (which I had never processed before). Apart from that, same camera, storage and handling and both films exposed maybe a week apart. I should perhaps also add that the films went through airport security (carry-on bag) between exposure and development.

    – Kahovius
    12 hours ago











  • What kind of reels are you using?

    – Blrfl
    9 hours ago






  • 2





    Can you describe the specific error in text, to make it easier for people with similarly problems to find in the future?

    – mattdm
    8 hours ago






  • 1





    If one of the films was 'odd' out of the can, then it's likely the Foma. I love Foma (particularly the papers) but their film bases are not as good as Ilford's: they're often a significant pain to load.

    – tfb
    7 hours ago


















7















I recently developed two 35mm films together in a tank. One, and only one of them, came out with these artefacts on most (but not all) of the exposures:



enter image description here



(Negative digitized using a digital camera; you can just about discern the film sprocket holes behind the improvised white mask.)



I'm new to film processing, having developed ~10 films so far; I have never encountered this problem before, but it looks to me like an agitation issue. The procedure was as follows:




  1. Loaded two 35mm films in a Jobo tank, one reel on top of the other. The films were Ilford FP4+ rated at EI64 and Fomapan 100 rated at EI100. The film with the problem is FP4+; Fomapan came out perfect. I don't remember which film was on top.

  2. Developed in 1:4 Ilfotec DD-X for 8 minutes in 20°C, following Ilford's recommended agitation routine (4 inversions spread out over 10 seconds every 1 minute), except that at one point I had a bit of a lapse of attention and there was 1½ minutes between two successive agitations (and then only ½ a minute before the next one).

  3. Stopped in Ilfostop.

  4. Fixed with 1:4 Ilford Rapid Fixer, 2 or 3 minutes.

  5. Washed using Ilford's "fill tank with water, invert n number of times, pour water out, repeat, repeat and repeat" method.


My specific questions:




  1. What caused this artefact, and why does it appear on one film only?

  2. Would the order in which the films were loaded have an effect? Is the damaged one more likely to have sat at the bottom or at the top?

  3. What can I do to avoid this sort of thing in the future?










share|improve this question







New contributor




Kahovius is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





















  • The films were both exposed in the same camera, yes? With similar storage/handling before/after exposure? Any other differences between the films before you got to the point of starting development?

    – osullic
    12 hours ago






  • 1





    Now that you mention it, I do remember that when I opened one of the film canisters, the film seemed to be "sticking to itself" in a way I had never experienced before. I don't know if it was the FP4 or the Fomapan, but I suspect the first. I didn't think much of it at the time – just thought this was characteristic of this type of film (which I had never processed before). Apart from that, same camera, storage and handling and both films exposed maybe a week apart. I should perhaps also add that the films went through airport security (carry-on bag) between exposure and development.

    – Kahovius
    12 hours ago











  • What kind of reels are you using?

    – Blrfl
    9 hours ago






  • 2





    Can you describe the specific error in text, to make it easier for people with similarly problems to find in the future?

    – mattdm
    8 hours ago






  • 1





    If one of the films was 'odd' out of the can, then it's likely the Foma. I love Foma (particularly the papers) but their film bases are not as good as Ilford's: they're often a significant pain to load.

    – tfb
    7 hours ago














7












7








7








I recently developed two 35mm films together in a tank. One, and only one of them, came out with these artefacts on most (but not all) of the exposures:



enter image description here



(Negative digitized using a digital camera; you can just about discern the film sprocket holes behind the improvised white mask.)



I'm new to film processing, having developed ~10 films so far; I have never encountered this problem before, but it looks to me like an agitation issue. The procedure was as follows:




  1. Loaded two 35mm films in a Jobo tank, one reel on top of the other. The films were Ilford FP4+ rated at EI64 and Fomapan 100 rated at EI100. The film with the problem is FP4+; Fomapan came out perfect. I don't remember which film was on top.

  2. Developed in 1:4 Ilfotec DD-X for 8 minutes in 20°C, following Ilford's recommended agitation routine (4 inversions spread out over 10 seconds every 1 minute), except that at one point I had a bit of a lapse of attention and there was 1½ minutes between two successive agitations (and then only ½ a minute before the next one).

  3. Stopped in Ilfostop.

  4. Fixed with 1:4 Ilford Rapid Fixer, 2 or 3 minutes.

  5. Washed using Ilford's "fill tank with water, invert n number of times, pour water out, repeat, repeat and repeat" method.


My specific questions:




  1. What caused this artefact, and why does it appear on one film only?

  2. Would the order in which the films were loaded have an effect? Is the damaged one more likely to have sat at the bottom or at the top?

  3. What can I do to avoid this sort of thing in the future?










share|improve this question







New contributor




Kahovius is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












I recently developed two 35mm films together in a tank. One, and only one of them, came out with these artefacts on most (but not all) of the exposures:



enter image description here



(Negative digitized using a digital camera; you can just about discern the film sprocket holes behind the improvised white mask.)



I'm new to film processing, having developed ~10 films so far; I have never encountered this problem before, but it looks to me like an agitation issue. The procedure was as follows:




  1. Loaded two 35mm films in a Jobo tank, one reel on top of the other. The films were Ilford FP4+ rated at EI64 and Fomapan 100 rated at EI100. The film with the problem is FP4+; Fomapan came out perfect. I don't remember which film was on top.

  2. Developed in 1:4 Ilfotec DD-X for 8 minutes in 20°C, following Ilford's recommended agitation routine (4 inversions spread out over 10 seconds every 1 minute), except that at one point I had a bit of a lapse of attention and there was 1½ minutes between two successive agitations (and then only ½ a minute before the next one).

  3. Stopped in Ilfostop.

  4. Fixed with 1:4 Ilford Rapid Fixer, 2 or 3 minutes.

  5. Washed using Ilford's "fill tank with water, invert n number of times, pour water out, repeat, repeat and repeat" method.


My specific questions:




  1. What caused this artefact, and why does it appear on one film only?

  2. Would the order in which the films were loaded have an effect? Is the damaged one more likely to have sat at the bottom or at the top?

  3. What can I do to avoid this sort of thing in the future?







developing 35mm darkroom






share|improve this question







New contributor




Kahovius is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question







New contributor




Kahovius is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




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asked 13 hours ago









KahoviusKahovius

362




362




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New contributor





Kahovius is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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Check out our Code of Conduct.













  • The films were both exposed in the same camera, yes? With similar storage/handling before/after exposure? Any other differences between the films before you got to the point of starting development?

    – osullic
    12 hours ago






  • 1





    Now that you mention it, I do remember that when I opened one of the film canisters, the film seemed to be "sticking to itself" in a way I had never experienced before. I don't know if it was the FP4 or the Fomapan, but I suspect the first. I didn't think much of it at the time – just thought this was characteristic of this type of film (which I had never processed before). Apart from that, same camera, storage and handling and both films exposed maybe a week apart. I should perhaps also add that the films went through airport security (carry-on bag) between exposure and development.

    – Kahovius
    12 hours ago











  • What kind of reels are you using?

    – Blrfl
    9 hours ago






  • 2





    Can you describe the specific error in text, to make it easier for people with similarly problems to find in the future?

    – mattdm
    8 hours ago






  • 1





    If one of the films was 'odd' out of the can, then it's likely the Foma. I love Foma (particularly the papers) but their film bases are not as good as Ilford's: they're often a significant pain to load.

    – tfb
    7 hours ago



















  • The films were both exposed in the same camera, yes? With similar storage/handling before/after exposure? Any other differences between the films before you got to the point of starting development?

    – osullic
    12 hours ago






  • 1





    Now that you mention it, I do remember that when I opened one of the film canisters, the film seemed to be "sticking to itself" in a way I had never experienced before. I don't know if it was the FP4 or the Fomapan, but I suspect the first. I didn't think much of it at the time – just thought this was characteristic of this type of film (which I had never processed before). Apart from that, same camera, storage and handling and both films exposed maybe a week apart. I should perhaps also add that the films went through airport security (carry-on bag) between exposure and development.

    – Kahovius
    12 hours ago











  • What kind of reels are you using?

    – Blrfl
    9 hours ago






  • 2





    Can you describe the specific error in text, to make it easier for people with similarly problems to find in the future?

    – mattdm
    8 hours ago






  • 1





    If one of the films was 'odd' out of the can, then it's likely the Foma. I love Foma (particularly the papers) but their film bases are not as good as Ilford's: they're often a significant pain to load.

    – tfb
    7 hours ago

















The films were both exposed in the same camera, yes? With similar storage/handling before/after exposure? Any other differences between the films before you got to the point of starting development?

– osullic
12 hours ago





The films were both exposed in the same camera, yes? With similar storage/handling before/after exposure? Any other differences between the films before you got to the point of starting development?

– osullic
12 hours ago




1




1





Now that you mention it, I do remember that when I opened one of the film canisters, the film seemed to be "sticking to itself" in a way I had never experienced before. I don't know if it was the FP4 or the Fomapan, but I suspect the first. I didn't think much of it at the time – just thought this was characteristic of this type of film (which I had never processed before). Apart from that, same camera, storage and handling and both films exposed maybe a week apart. I should perhaps also add that the films went through airport security (carry-on bag) between exposure and development.

– Kahovius
12 hours ago





Now that you mention it, I do remember that when I opened one of the film canisters, the film seemed to be "sticking to itself" in a way I had never experienced before. I don't know if it was the FP4 or the Fomapan, but I suspect the first. I didn't think much of it at the time – just thought this was characteristic of this type of film (which I had never processed before). Apart from that, same camera, storage and handling and both films exposed maybe a week apart. I should perhaps also add that the films went through airport security (carry-on bag) between exposure and development.

– Kahovius
12 hours ago













What kind of reels are you using?

– Blrfl
9 hours ago





What kind of reels are you using?

– Blrfl
9 hours ago




2




2





Can you describe the specific error in text, to make it easier for people with similarly problems to find in the future?

– mattdm
8 hours ago





Can you describe the specific error in text, to make it easier for people with similarly problems to find in the future?

– mattdm
8 hours ago




1




1





If one of the films was 'odd' out of the can, then it's likely the Foma. I love Foma (particularly the papers) but their film bases are not as good as Ilford's: they're often a significant pain to load.

– tfb
7 hours ago





If one of the films was 'odd' out of the can, then it's likely the Foma. I love Foma (particularly the papers) but their film bases are not as good as Ilford's: they're often a significant pain to load.

– tfb
7 hours ago










2 Answers
2






active

oldest

votes


















7














This looks to me as if you have botched loading the film onto the spiral, so that two wraps of the film were touching or very close to each other. When that happens you tend to get marks on the negs where developer hasn't really reached them properly.



(I tend to get this with 5x4 negs processed in a mod54: huge negs like that are very flexible so if you agitate too much they can come out of the slots and end up resting on each other.)






share|improve this answer































    3














    I concur with tfb -- This is a film loading error. I don't think you can save the damaged frames but -- do try re-fixing in normal room light. This procedure might provide some improvement. Do try!






    share|improve this answer



















    • 1





      This is a good suggestion: if the dev didn't get to the frames then probably the fix did not either, so it is worth dunking them in fix for a bit to make sure they really are fixed, if you intend to keep them. As Alan says you can do this in white light.

      – tfb
      7 hours ago












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    2 Answers
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    7














    This looks to me as if you have botched loading the film onto the spiral, so that two wraps of the film were touching or very close to each other. When that happens you tend to get marks on the negs where developer hasn't really reached them properly.



    (I tend to get this with 5x4 negs processed in a mod54: huge negs like that are very flexible so if you agitate too much they can come out of the slots and end up resting on each other.)






    share|improve this answer




























      7














      This looks to me as if you have botched loading the film onto the spiral, so that two wraps of the film were touching or very close to each other. When that happens you tend to get marks on the negs where developer hasn't really reached them properly.



      (I tend to get this with 5x4 negs processed in a mod54: huge negs like that are very flexible so if you agitate too much they can come out of the slots and end up resting on each other.)






      share|improve this answer


























        7












        7








        7







        This looks to me as if you have botched loading the film onto the spiral, so that two wraps of the film were touching or very close to each other. When that happens you tend to get marks on the negs where developer hasn't really reached them properly.



        (I tend to get this with 5x4 negs processed in a mod54: huge negs like that are very flexible so if you agitate too much they can come out of the slots and end up resting on each other.)






        share|improve this answer













        This looks to me as if you have botched loading the film onto the spiral, so that two wraps of the film were touching or very close to each other. When that happens you tend to get marks on the negs where developer hasn't really reached them properly.



        (I tend to get this with 5x4 negs processed in a mod54: huge negs like that are very flexible so if you agitate too much they can come out of the slots and end up resting on each other.)







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 12 hours ago









        tfbtfb

        3244




        3244

























            3














            I concur with tfb -- This is a film loading error. I don't think you can save the damaged frames but -- do try re-fixing in normal room light. This procedure might provide some improvement. Do try!






            share|improve this answer



















            • 1





              This is a good suggestion: if the dev didn't get to the frames then probably the fix did not either, so it is worth dunking them in fix for a bit to make sure they really are fixed, if you intend to keep them. As Alan says you can do this in white light.

              – tfb
              7 hours ago
















            3














            I concur with tfb -- This is a film loading error. I don't think you can save the damaged frames but -- do try re-fixing in normal room light. This procedure might provide some improvement. Do try!






            share|improve this answer



















            • 1





              This is a good suggestion: if the dev didn't get to the frames then probably the fix did not either, so it is worth dunking them in fix for a bit to make sure they really are fixed, if you intend to keep them. As Alan says you can do this in white light.

              – tfb
              7 hours ago














            3












            3








            3







            I concur with tfb -- This is a film loading error. I don't think you can save the damaged frames but -- do try re-fixing in normal room light. This procedure might provide some improvement. Do try!






            share|improve this answer













            I concur with tfb -- This is a film loading error. I don't think you can save the damaged frames but -- do try re-fixing in normal room light. This procedure might provide some improvement. Do try!







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 8 hours ago









            Alan MarcusAlan Marcus

            25.9k23060




            25.9k23060








            • 1





              This is a good suggestion: if the dev didn't get to the frames then probably the fix did not either, so it is worth dunking them in fix for a bit to make sure they really are fixed, if you intend to keep them. As Alan says you can do this in white light.

              – tfb
              7 hours ago














            • 1





              This is a good suggestion: if the dev didn't get to the frames then probably the fix did not either, so it is worth dunking them in fix for a bit to make sure they really are fixed, if you intend to keep them. As Alan says you can do this in white light.

              – tfb
              7 hours ago








            1




            1





            This is a good suggestion: if the dev didn't get to the frames then probably the fix did not either, so it is worth dunking them in fix for a bit to make sure they really are fixed, if you intend to keep them. As Alan says you can do this in white light.

            – tfb
            7 hours ago





            This is a good suggestion: if the dev didn't get to the frames then probably the fix did not either, so it is worth dunking them in fix for a bit to make sure they really are fixed, if you intend to keep them. As Alan says you can do this in white light.

            – tfb
            7 hours ago










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