Blue streaks on film

Hi, so I've recently started processing my own film. I use sprint chemicals and Ilford Delta 400 film. I've been getting lengthwise blue streaks on the film (see picture). I'm using a two reel plastic tank, and rotational agitation. Does anyone know why these streaks would be happening?

 

Off the top of my head, I wonder if it is caused by the agitation technique, as it runs parallel with the direction of agitation. When I did my own processing, I always used inversion agitation - you might like to see if that improves matters. Forgive my ignorance - is Delta 400 chromogenic ? If not, further fixing might make a difference to the films you have already processed. Wash it again afterwards, of course. Good luck, anyway.

Try immersing a strip with the streaks in fixer again for double the recommended time and see if the streaks clear up.

Hi, concur with Mike.

 

It's hard to tell from your photo, but if the bluish area is more opaque, then most likely the fixer didn't get to it very well. My guess is that you didn't get the film loaded quite right, and that parts of the film were touching together. (The little kinks on the right side of the film suggest that it came out of the reel's film channels.) If this is the case then the development in those areas was also affected.

Film loading on the reels is the problem. If the film was touching itself or something else like the center column or tank there would be no image, just a bluish/white blob where the contact was. What is happening is the film is buckling and reducing the space between the rounds on the reel limiting the chemical flow in those areas.

Refix the film as suggested in post #3.

Practice loading the reel(s) with an uncut roll of film examining the reel from a side view to verify the space between the rounds of film is equal throughout the reel.